[Federal Register Volume 84, Number 148 (Thursday, August 1, 2019)]
[Notices]
[Pages 37710-37711]
[FR Doc No: 2019-16377]

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DEPARTMENT OF TRANSPORTATION

Federal Railroad Administration

[Docket Number FRA-2017-0082]

Notice of Application for Approval of Discontinuance or
Modification of a Railroad Signal System

    Under part 235 of Title 49 of the Code of Federal Regulations (CFR)
and 49 U.S.C. 20502(a), this document provides the public notice that
by a document dated July 22, 2019, the Denver Regional Transportation
District Commuter Rail (RTDC) petitioned the Federal Railroad
Administration (FRA) seeking approval for amendments to FRA-2017-0082.
    Applicant: Regional Transportation District Commuter Rail, Mr.
Allen W. Miller, Deputy Assistant Senior Manager, Commuter Rail, 1560
Broadway, Suite 650, Denver, CO 80202.
    Regional Transportation District (RTD) is the owner of the line
segment and BNSF Railway (BNSF) and the National Railroad Passenger
Corporation (Amtrak) are the operators. RTDC seeks to modify the
Automatic Block Signal (ABS) and Traffic Control System (TCS) on the
BNSF and RTDC line segment between the 41D and 43D derails, switch 29,
and the 8S signal, on the East and West Yard Track segments near Denver
Union Station (DUS) Interlocking, between milepost (MP) 0.00 and MP
0.49.
    BNSF uses this 500-foot line segment between the 41D and 43D
derails, switch 29, and the 8S signal primarily for locomotive
switching moves and Amtrak operates on this line segment to move in and
out of DUS Tracks #4 and #5 for passenger operations.
    The current signal system design uses the 41D, East Yard Track, and
43D West Yard Track, switch indication lights to govern traffic in
advance of the derails on the yard tracks and in approach to the 8S
signal at DUS Interlocking. The 41D and 43D derails and switch 29 are
interlocked with the 8S signal at DUS Interlocking. The violation of
the 8S signal, toward DUS, is safeguarded by the 49D derail.
    The application states that disconnecting the circuitry of the 41D
and 43D derail and switch 29 from 8S signal at DUS Interlocking
complies with 49 CFR part 236. All existing home signals are retained.
The 41D and 43D derails, switch 29, and associated switch indication
lights remain powered but are controlled and monitored independently
from the DUS Interlocking. The movement of switch 29 is electrically
tied to the 41D and 43D derails. Positioning of switch 29 is determined
by the position of the corresponding derail, aligning to the derail
which is in the non-derailing position and locked. Although the switch
and derails are removed from the DUS Interlocking logics, a minimum of
two indications from switch 29, one being switch position and the other
being the locked indication, are established to provide safe routing
through DUS between the platform and beyond the 41D and 43D derails in
both directions.
    The July 22, 2019, request states that to protect against incursion
into the RTDC tracks, the 100 feet of center gauge restraining rail
which was to be installed south of the 49D derail, toward DUS, will be
replaced, as an additional safety measure, with a minimum of 50 feet of
double guard rail. RTDC contends the safety of the operation is
maintained by the 8S signal and associated 49D derail, along with the
double guard rail, both part of the DUS Interlocking; as well as the
independent 41D and 43D derails, switch 29 and associated switch
indication lights, providing additional protection of unauthorized yard
movements. The reasons for the proposed changes are to improve
reliability and safety, expedite train movements, and warrant
compliance with 49 CFR part 236 for present train operations.
    A copy of the petition, as well as any written communications
concerning the petition, is available for review online at
www.regulations.gov and in person at the U. S. Department of
Transportation's Docket Operations Facility, 1200 New Jersey Avenue SE,
W12-140, Washington, DC 20590. The Docket Operations Facility is open
from 9 a.m. to 5 p.m., Monday through Friday, except Federal Holidays.
    Interested parties are invited to participate in these proceedings
by submitting written views, data, or comments. FRA does not anticipate
scheduling a public hearing in connection with these proceedings since
the facts do not appear to warrant a hearing. If any interested party
desires an opportunity for oral comment, they should notify FRA, in
writing, before the end of the comment period and specify the basis for
their request.
    All communications concerning these proceedings should identify the
appropriate docket number and may be submitted by any of the following
methods:
     Website: http://www.regulations.gov. Follow the online
instructions for submitting comments.
     Fax:<PHONE_NUMBER>.
     Mail: Docket Operations Facility, U.S. Department of
Transportation, 1200

New Jersey Avenue SE, W12-140, Washington, DC 20590.
     Hand Delivery: 1200 New Jersey Avenue SE, Room W12-140,
Washington, DC 20590, between 9 a.m. and 5 p.m., Monday through Friday,
except Federal Holidays.
    Communications received by September 16, 2019 will be considered by
FRA before final action is taken. Comments received after that date
will be considered if practicable.
    Anyone can search the electronic form of any written communications
and comments received into any of our dockets by the name of the
individual submitting the comment (or signing the document, if
submitted on behalf of an association, business, labor union, etc.).
Under 5 U.S.C. 553(c), DOT solicits comments from the public to better
inform its processes. DOT posts these comments, without edit, including
any personal information the commenter provides, to
www.regulations.gov, as described in the system of records notice (DOT/
ALL-14 FDMS), which can be reviewed at www.dot.gov/privacy. See also
http://www.regulations.gov/#!privacyNotice for the privacy notice of
regulations.gov.

    Issued in Washington, DC.
John Karl Alexy,
Associate Administrator for Safety Chief Safety Officer.
[FR Doc. 2019-16377 Filed 7-31-19; 8:45 am]
BILLING CODE 4910-06-P


[Federal Register: September 4, 2009 (Volume 74, Number 171)]
[Proposed Rules]
[Page 45787-45789]
[DOCID:fr04se09-20]

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DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2009-0785; Directorate Identifier 2009-NM-125-AD]
RIN 2120-AA64

Airworthiness Directives; Bombardier Model DHC-8-400 Series
Airplanes

AGENCY: Federal Aviation Administration (FAA), DOT.

ACTION: Notice of proposed rulemaking (NPRM).

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SUMMARY: We propose to adopt a new airworthiness directive (AD) for the
products listed above that would supersede an existing AD. This
proposed AD results from mandatory continuing airworthiness information
(MCAI) originated by an aviation authority of another country to
identify and correct an unsafe condition on an aviation product. The
MCAI describes the unsafe condition as:

    There has been one case reported of failure of a shaft
(tailstock) on an elevator Power Control Unit (PCU), Part Number (P/
N)<PHONE_NUMBER>. Continued actuation of the affected PCU caused
damage to the surrounding structure. * * *
    Each elevator surface has three PCUs, powered by separate
independent hydraulic systems, and a single elevator PCU shaft
failure may remain dormant. Such a dormant loss of redundancy,
coupled with the potential for a failed shaft to produce collateral
damage, including damage to hydraulic lines, could possibly affect
the controllability of the aircraft.
* * * * *
    The proposed AD would require actions that are intended to address
the unsafe condition described in the MCAI.

DATES: We must receive comments on this proposed AD by October 5, 2009.

ADDRESSES: You may send comments by any of the following methods:
     Federal eRulemaking Portal: Go to http://
www.regulations.gov. Follow the instructions for submitting comments.
     Fax:<PHONE_NUMBER>.
     Mail: U.S. Department of Transportation, Docket
Operations, M-30, West Building Ground Floor, Room W12-140, 1200 New
Jersey Avenue, SE., Washington, DC 20590.
     Hand Delivery: U.S. Department of Transportation, Docket
Operations, M-30, West Building Ground Floor, Room W12-40, 1200 New
Jersey Avenue, SE., Washington, DC, between 9 a.m. and 5 p.m., Monday
through Friday, except Federal holidays.
    For service information identified in this proposed AD, contact
Bombardier, Inc., 400 C[ocirc]te-Vertu Road West, Dorval, Qu[eacute]bec
H4S 1Y9, Canada; telephone<PHONE_NUMBER>; fax<PHONE_NUMBER>; e-mail
<EMAIL_ADDRESS>Internet http://www.bombardier.com.
You may review copies of the referenced service information at the FAA,
Transport Airplane Directorate, 1601 Lind Avenue, SW., Renton,
Washington. For information on the availability of this material at the
FAA, call<PHONE_NUMBER> or<PHONE_NUMBER>.

Examining the AD Docket

    You may examine the AD docket on the Internet at http://
www.regulations.gov; or in person at the Docket Operations office
between 9 a.m. and 5 p.m., Monday through Friday, except Federal
holidays. The AD docket contains this proposed AD, the

regulatory evaluation, any comments received, and other information.
The street address for the Docket Operations office (telephone (800)
647-5527) is in the ADDRESSES section. Comments will be available in
the AD docket shortly after receipt.

FOR FURTHER INFORMATION CONTACT: Cesar Gomez, Aerospace Engineer,
Airframe and Mechanical Systems Branch, ANE-171, FAA, New York Aircraft
Certification Office, 1600 Stewart Avenue, Suite 410, Westbury, New
York 11590; telephone<PHONE_NUMBER>; fax<PHONE_NUMBER>.

SUPPLEMENTARY INFORMATION:

Comments Invited

    We invite you to send any written relevant data, views, or
arguments about this proposed AD. Send your comments to an address
listed under the ADDRESSES section. Include ``Docket No. FAA-2009-0785;
Directorate Identifier 2009-NM-125-AD'' at the beginning of your
comments. We specifically invite comments on the overall regulatory,
economic, environmental, and energy aspects of this proposed AD. We
will consider all comments received by the closing date and may amend
this proposed AD based on those comments.
    We will post all comments we receive, without change, to http://
www.regulations.gov, including any personal information you provide. We
will also post a report summarizing each substantive verbal contact we
receive about this proposed AD.

Discussion

    On June 3, 2009, we issued AD 2009-12-13, Amendment 39-15936 (74 FR
27686, June 11, 2009). That AD required actions intended to address an
unsafe condition on the products listed above.
    When we issued AD 2009-12-13, the eventual replacement of all
elevator PCUs identified in paragraph (f)(1) of that AD was not
required. We have now determined that further rulemaking is necessary
for this action, and this proposed AD follows from that determination.
We are proposing to mandate the optional terminating action in
paragraph (f)(3) of AD 2009-12-13 in this AD. You may obtain further
information by examining the MCAI in the AD docket.

FAA's Determination and Requirements of This Proposed AD

    This product has been approved by the aviation authority of another
country, and is approved for operation in the United States. Pursuant
to our bilateral agreement with the State of Design Authority, we have
been notified of the unsafe condition described in the MCAI and service
information referenced above. We are proposing this AD because we
evaluated all pertinent information and determined an unsafe condition
exists and is likely to exist or develop on other products of the same
type design.

Differences Between This AD and the MCAI or Service Information

    We have reviewed the MCAI and related service information and, in
general, agree with their substance. But we might have found it
necessary to use different words from those in the MCAI to ensure the
AD is clear for U.S. operators and is enforceable. In making these
changes, we do not intend to differ substantively from the information
provided in the MCAI and related service information.
    We might also have proposed different actions in this AD from those
in the MCAI in order to follow FAA policies. Any such differences are
highlighted in a note within the proposed AD.

Costs of Compliance

    Based on the service information, we estimate that this proposed AD
would affect about 61 products of U.S. registry.
    The actions that are required by AD 2009-12-13 and retained in this
proposed AD take about 3 work-hours per product, at an average labor
rate of $80 per work hour. Based on these figures, the estimated cost
of the currently required actions is $240 per product.
    We estimate that it would take about 13 work-hours per product to
comply with the new basic requirements of this proposed AD. The average
labor rate is $80 per work-hour. Required parts would cost about $0 per
product. Where the service information lists required parts costs that
are uncovered under warranty, we have assumed that there will be no
charge for these costs. As we do not control warranty coverage for
affected parties, some parties may incur costs higher than estimated
here. Based on these figures, we estimate the cost of the new actions
of this proposed AD on U.S. operators to be $63,440, or $1,040 per
product.

Authority for This Rulemaking

    Title 49 of the United States Code specifies the FAA's authority to
issue rules on aviation safety. Subtitle I, section 106, describes the
authority of the FAA Administrator. ``Subtitle VII: Aviation
Programs,'' describes in more detail the scope of the Agency's
authority.
    We are issuing this rulemaking under the authority described in
``Subtitle VII, Part A, Subpart III, Section 44701: General
requirements.'' Under that section, Congress charges the FAA with
promoting safe flight of civil aircraft in air commerce by prescribing
regulations for practices, methods, and procedures the Administrator
finds necessary for safety in air commerce. This regulation is within
the scope of that authority because it addresses an unsafe condition
that is likely to exist or develop on products identified in this
rulemaking action.

Regulatory Findings

    We determined that this proposed AD would not have federalism
implications under Executive Order 13132. This proposed AD would not
have a substantial direct effect on the States, on the relationship
between the national Government and the States, or on the distribution
of power and responsibilities among the various levels of government.
    For the reasons discussed above, I certify this proposed
regulation:
    1. Is not a ``significant regulatory action'' under Executive Order
12866;
    2. Is not a ``significant rule'' under the DOT Regulatory Policies
and Procedures (44 FR 11034, February 26, 1979); and
    3. Will not have a significant economic impact, positive or
negative, on a substantial number of small entities under the criteria
of the Regulatory Flexibility Act.
    We prepared a regulatory evaluation of the estimated costs to
comply with this proposed AD and placed it in the AD docket.

List of Subjects in 14 CFR Part 39

    Air transportation, Aircraft, Aviation safety, Incorporation by
reference, Safety.

The Proposed Amendment

    Accordingly, under the authority delegated to me by the
Administrator, the FAA proposes to amend 14 CFR part 39 as follows:

PART 39--AIRWORTHINESS DIRECTIVES

    1. The authority citation for part 39 continues to read as follows:

    Authority: 49 U.S.C. 106(g), 40113, 44701.

Sec.  39.13  [Amended]

    2. The FAA amends Sec.  39.13 by removing Amendment 39-15936 (74 FR
27686, June 11, 2009) and adding the following new AD:

Bombardier, Inc. (Formerly de Havilland, Inc.): Docket No. FAA-2009-
0785; Directorate Identifier 2009-NM-125-AD.

Comments Due Date

    (a) We must receive comments by October 5, 2009.

Affected ADs

    (b) The proposed AD supersedes AD 2009-12-13, Amendment 39-
15936.

Applicability

    (c) This AD applies to Bombardier Model DHC-8-400, DHC-8-401,
and DHC-8-402 airplanes, certificated in any category, serial
numbers 4135 through 4149 inclusive.

Subject

    (d) Air Transport Association (ATA) of America Code 27: Flight
Controls.

Reason

    (e) The mandatory continuing airworthiness information (MCAI)
states:
    There has been one case reported of failure of a shaft
(tailstock) on an elevator Power Control Unit (PCU), Part Number (P/
N)<PHONE_NUMBER>. Continued actuation of the affected PCU caused
damage to the surrounding structure. Subsequent investigation
determined that the failure was the result of a material defect and
that the shafts installed on a total of 88 suspect PCUs * * * may
contain a similar defect.
    Each elevator surface has three PCUs, powered by separate
independent hydraulic systems, and a single elevator PCU shaft
failure may remain dormant. Such a dormant loss of redundancy,
coupled with the potential for a failed shaft to produce collateral
damage, including damage to hydraulic lines, could possibly affect
the controllability of the aircraft.
    This directive mandates an identification check for elevator PCU
serial numbers, a daily check for correct operation of all suspect
PCUs and, finally, replacement of all suspect PCUs.

Restatement of Requirements of AD 2009-12-13, Without Optional
Terminating Action

    (f) Unless already done, do the following actions.
    (1) Within 30 days after June 26, 2009 (the effective date of AD
2009-12-13), inspect the serial number of each of the six installed
elevator PCUs having P/N<PHONE_NUMBER>. If one or more of the six
installed elevator PCUs, P/N<PHONE_NUMBER>, have any of the PCU serial
numbers 238, 698, 783 through 788 inclusive, 790, 793, 795, 802,
806, 807, 810, 820 through 823 inclusive, 826 through 828 inclusive,
831, 835, 838, 840, 886 through 889 inclusive, or 898 through 955
inclusive; without a suffix ``A'' after the serial number: Within 30
days after June 26, 2009, perform a check for the correct operation
of all installed elevator PCUs in accordance with the procedures
detailed in Appendix A, B, or C of Bombardier Q400 All Operator
Message 217B, dated April 26, 2007. Repeat the check thereafter
before the first flight of each day until the replacement specified
in paragraph (g) of this AD is done. The checks in Appendix A and B
of Bombardier Q400 All Operator Message 217B, dated April 26, 2007,
must be performed by the flight crew, while the check specified in
Appendix C of the all operator message must be performed by
certificated maintenance personnel.

    Note 1: Suffix ``A'' after the serial number indicates that the
PCU has already passed a magnetic particle inspection and is cleared
for continued use.

    (2) If incorrect operation of any elevator PCU is found during
any check required by paragraph (f)(1) of this AD, before further
flight, replace the elevator PCU with a PCU, P/N<PHONE_NUMBER>, having
a serial number not specified in paragraph (f)(1) of this AD; or
with a PCU, P/N<PHONE_NUMBER>, having the suffix ``A'' after the
serial number; in accordance with the Accomplishment Instructions of
Bombardier Service Bulletin 84-27-32, Revision A, dated January 18,
2008.
    (3) Actions accomplished before June 26, 2009, according to
Bombardier Service Bulletin 84-27-32, dated May 1, 2007, are
considered acceptable for compliance with the corresponding action
specified in this AD.

New Requirements of This AD: Actions and Compliance

    (g) Unless already done, within 2,000 flight hours or 12 months
after the effective date of this AD, whichever occurs later, replace
all PCUs, P/N<PHONE_NUMBER>, having a serial number specified in
paragraph (f)(1) of this AD, and not having suffix ``A'' after the
serial number, with PCUs, P/N<PHONE_NUMBER>, having a serial number
not specified in paragraph (f)(1) of this AD; or with PCUs, P/N
390600-1007, having the suffix ``A'' after the serial number; in
accordance with the Accomplishment Instructions of Bombardier
Service Bulletin 84-27-32, Revision A, dated January 18, 2008. This
action terminates the requirements of paragraph (f)(1) of this AD.

FAA AD Differences

    Note 2: This AD differs from the MCAI and/or service information
as follows: No differences.

Other FAA AD Provisions

    (h) The following provisions also apply to this AD:
    (1) Alternative Methods of Compliance (AMOCs): The Manager, New
York Aircraft Certification Office (ACO), FAA, has the authority to
approve AMOCs for this AD, if requested using the procedures found
in 14 CFR 39.19. Send information to ATTN: Cesar Gomez, Aerospace
Engineer, Airframe and Mechanical Systems Branch, ANE-171, FAA, New
York Aircraft Certification Office, 1600 Stewart Avenue, Suite 410,
Westbury, New York 11590; telephone<PHONE_NUMBER>; fax (516) 794-
5531. Before using any approved AMOC on any airplane to which the
AMOC applies, notify your principal maintenance inspector (PMI) or
principal avionics inspector (PAI), as appropriate, or lacking a
principal inspector, your local Flight Standards District Office.
The AMOC approval letter must specifically reference this AD.
    (2) Airworthy Product: For any requirement in this AD to obtain
corrective actions from a manufacturer or other source, use these
actions if they are FAA-approved. Corrective actions are considered
FAA-approved if they are approved by the State of Design Authority
(or their delegated agent). You are required to assure the product
is airworthy before it is returned to service.
    (3) Reporting Requirements: For any reporting requirement in
this AD, under the provisions of the Paperwork Reduction Act, the
Office of Management and Budget (OMB) has approved the information
collection requirements and has assigned OMB Control Number 2120-
0056.

Related Information

    (i) Refer to MCAI Canadian Airworthiness Directive CF-2009-16,
dated April 20, 2009; Bombardier Service Bulletin 84-27-32, Revision
A, dated January 18, 2008; and Bombardier Q400 All Operator Message
217B, dated April 26, 2007; for related information.

    Issued in Renton, Washington, on August 26, 2009.
Ali Bahrami,
Manager, Transport Airplane Directorate, Aircraft Certification
Service.
[FR Doc. E9-21339 Filed 9-3-09; 8:45 am]

BILLING CODE 4910-13-P


[Federal Register Volume 87, Number 174 (Friday, September 9, 2022)]
[Proposed Rules]
[Pages 55322-55325]
[FR Doc No: 2022-19232]

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DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2022-1151; Project Identifier MCAI-2020-01603-T]
RIN 2120-AA64

Airworthiness Directives; De Havilland Aircraft of Canada Limited
(Type Certificate Previously Held by Bombardier, Inc.) Airplanes

AGENCY: Federal Aviation Administration (FAA), DOT.

ACTION: Notice of proposed rulemaking (NPRM).

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SUMMARY: The FAA proposes to adopt a new airworthiness directive (AD)
for certain De Havilland Aircraft of Canada Limited Model DHC-8-400
series airplanes. This proposed AD was prompted by a report that
electrical bonding jumpers had been installed on fuel scavenge lines
even after the removal was required by previous AD rulemaking and that
electrical bonding jumpers may have been installed in production or in
service at other locations. This proposed AD would require an
inspection for electrical bonding jumpers and brackets on the fuel
scavenge and vent lines at specific wing locations, and if installed,
removal or modification of those jumpers and brackets. This proposed AD
would also require a records check to determine if certain maintenance
tasks were performed and removal, modification, or rework if those
tasks were performed. This proposed AD would also prohibit the use of
earlier versions of certain maintenance tasks. The FAA is proposing
this AD to address the unsafe condition on these products.

DATES: The FAA must receive comments on this proposed AD by October 24,
2022.

ADDRESSES: You may send comments, using the procedures found in 14 CFR
11.43 and 11.45, by any of the following methods:
     Federal eRulemaking Portal: Go to regulations.gov. Follow
the instructions for submitting comments.
     Fax:<PHONE_NUMBER>.
     Mail: U.S. Department of Transportation, Docket
Operations, M-30, West Building Ground Floor, Room W12-140, 1200 New
Jersey Avenue SE, Washington, DC 20590.
     Hand Delivery: Deliver to Mail address above between 9
a.m. and 5 p.m., Monday through Friday, except Federal holidays.
    For service information identified in this NPRM, contact De
Havilland Aircraft of Canada Limited, Dash 8 Series Customer Response
Centre, 5800 Explorer Drive, Mississauga, Ontario, L4W 5K9, Canada;
North America (toll-free):<PHONE_NUMBER>, Direct:<PHONE_NUMBER>; email
dehavilland.com">[email protected]dehavilland.com; internet dehavilland.com. You may view this
service information at the FAA, Airworthiness Products Section,
Operational Safety Branch, 2200 South 216th St., Des Moines, WA. For
information on the availability of this material at the FAA, call 206-
231-3195.

Examining the AD Docket

    You may examine the AD docket at regulations.gov by searching for
and locating Docket No. FAA-2022-1151; or in person at Docket
Operations between 9 a.m. and 5 p.m., Monday through Friday, except
Federal holidays. The AD docket contains this NPRM, the mandatory
continuing airworthiness information (MCAI), any comments received, and
other information. The street address for Docket Operations is listed
above.

FOR FURTHER INFORMATION CONTACT: Joseph Catanzaro, Aerospace Engineer,
Airframe and Propulsion Section, FAA, New York ACO Branch, 1600 Stewart
Avenue, Suite 410, Westbury, NY 11590; telephone<PHONE_NUMBER>; email [email protected].

SUPPLEMENTARY INFORMATION:

Comments Invited

    The FAA invites you to send any written relevant data, views, or
arguments about this proposal. Send your comments to an address listed
under ADDRESSES. Include ``Docket No. FAA-2022-1151; Project Identifier
MCAI-2020-01603-T'' at the beginning of your comments. The most helpful
comments reference a specific portion of the proposal, explain the
reason for any recommended change, and include supporting data. The FAA
will consider all comments received by the closing date and may amend
the proposal because of those comments.

    Except for Confidential Business Information (CBI) as described in
the following paragraph, and other information as described in 14 CFR
11.35, the FAA will post all comments received, without change, to
regulations.gov, including any personal information you provide. The
agency will also post a report summarizing each substantive verbal
contact received about this NPRM.

Confidential Business Information

    CBI is commercial or financial information that is both customarily
and actually treated as private by its owner. Under the Freedom of
Information Act (FOIA) (5 U.S.C. 552), CBI is exempt from public
disclosure. If your comments responsive to this NPRM contain commercial
or financial information that is customarily treated as private, that
you actually treat as private, and that is relevant or responsive to
this NPRM, it is important that you clearly designate the submitted
comments as CBI. Please mark each page of your submission containing
CBI as ``PROPIN.'' The FAA will treat such marked submissions as
confidential under the FOIA, and they will not be placed in the public
docket of this NPRM. Submissions containing CBI should be sent to
Joseph Catanzaro, Aerospace Engineer, Airframe and Propulsion Section,
FAA, New York ACO Branch, 1600 Stewart Avenue, Suite 410, Westbury, NY
11590; telephone<PHONE_NUMBER>; email [email protected]. Any
commentary that the FAA receives which is not specifically designated
as CBI will be placed in the public docket for this rulemaking.

Background

    Transport Canada Civil Aviation (TCCA), which is the aviation
authority for Canada, has issued TCCA AD CF-2020-01, dated January 14,
2020 (TCCA AD CF-2020-01) (also referred to after this as the MCAI), to
correct an unsafe condition for certain De Havilland Aircraft of Canada
Limited Model DHC-8-400, -401, and -402 airplanes. You may examine the
MCAI in the AD docket at regulations.gov by searching for and locating
Docket No. FAA-2022-1151.
    This proposed AD was prompted by a report that electrical bonding
jumpers had been installed on fuel scavenge lines even after the
removal was required by TCCA AD CF-2010-31, dated September 3, 2010
(which corresponds to FAA AD 2011-13-06, Amendment 39-16729 (76 FR
37258, June 27, 2011) (AD 2011-13-06)). AD 2011-13-06 required
modifications to the fuel system to address a potential ignition source
within the fuel system. Subsequent investigation showed that electrical
bonding jumpers may have been installed in production or in service at
other locations on the fuel scavenge and vent lines. If installed,
these electrical bonding jumpers could affect the integrity of the fuel
scavenge and vent lines' electrical bonding paths. The FAA is proposing
this AD to address altered electrical bonding paths, which may lead to
lightning strike-induced ignition of the fuel tank. See the MCAI for
additional background information.
    Since the electrical bonding jumpers may have been installed during
the accomplishment of certain maintenance tasks, this proposed AD would
prohibit the use of those maintenance tasks. Those prohibited tasks may
have been accomplished at any point after the airplane was produced.
For airplanes on which any of the prohibited tasks were accomplished,
this AD would require re-accomplishing the inspection for electrical
bonding jumpers and brackets on the fuel scavenge and vent lines at
specific wing locations and removal or modification of those bonding
jumpers and brackets; or rework using a method approved by the Manager,
New York ACO Branch, FAA; or TCCA; or De Havilland Aircraft of Canada
Limited's TCCA Design Approval Organization (DAO); depending on
configuration.

Related Service Information Under 1 CFR Part 51

    De Havilland Aircraft of Canada Limited has issued Bombardier
Service Bulletins 84-28-29; and 84-28-30; both dated October 17, 2018;
which describe procedures for an inspection of certain wing stations in
the left and right wings for the presence of brackets and electrical
bonding jumpers on the fuel scavenge and vent lines, and if installed,
removal or modification of those electrical bonding jumpers and
brackets. These documents are distinct because they apply to different
airplane configurations.
    De Havilland Aircraft of Canada Limited has also issued the
following Bombardier service information, which describes fuel system
limitations or airworthiness limitations for fuel tank systems. These
documents are distinct because they apply to different airplane
configurations.
     (Bombardier) Q400 Dash 8 Aircraft Maintenance Manual (AMM)
Temporary Revision (TR) 28-170, dated November 2, 2018.
     (Bombardier) Q400 Dash 8 AMM TR 28-171, dated November 2,
2018.
     (Bombardier) Q400 Dash 8 AMM TR 28-166, dated November 2,
2018.
     (Bombardier) Q400 Dash 8 AMM TR 28-167, dated November 2,
2018.
     (Bombardier) Q400 Dash 8 AMM TR 28-168, dated November 2,
2018.
     (Bombardier) Q400 Dash 8 AMM TR 28-169 dated November 2,
2018.
     (Bombardier) Q400 Dash 8 AMM TR 28-163, dated August 1,
2018
     (Bombardier) Q400 Dash 8 Maintenance Task Card Manual
(MTCM) Maintenance Task Card 000-28-520-704 (Config A01), Detailed
Inspection of the Teflon\TM\ Sleeve on the Fuel Tank Vent Line (LH),
Revision 43, Amendment 0001, dated August 1, 2018.
     (Bombardier) Q400 Dash 8 MTCM Maintenance Task Card 000-
28-620-704 (Config A01), Detailed Inspection of the Teflon\TM\ Sleeve
on the Fuel Tank Vent Line (RH), Revision 43, Amendment 0001, dated
August 1, 2018.
    This service information is reasonably available because the
interested parties have access to it through their normal course of
business or by the means identified in the ADDRESSES section.

FAA's Determination

    This product has been approved by the aviation authority of another
country, and is approved for operation in the United States. Pursuant
to the FAA's bilateral agreement with the State of Design Authority,
the FAA has been notified of the unsafe condition described in the MCAI
and service information referenced above. The FAA is proposing this AD
because the FAA evaluated all the relevant information and determined
the unsafe condition described previously is likely to exist or develop
on other products of the same type design.

Proposed AD Requirements in This NPRM

    This proposed AD would require accomplishing the actions specified
in the service information already described. This proposed AD would
also require a records check to determine if certain maintenance tasks
were performed. This proposed AD would also prohibit the use of earlier
versions of certain maintenance tasks.

Costs of Compliance

    The FAA estimates that this AD, if adopted as proposed, would
affect 53 airplanes of U.S. registry. The FAA estimates the following
costs to comply with this proposed AD:

                                      Estimated Costs for Required Actions
----------------------------------------------------------------------------------------------------------------
                                                                                Cost per       Cost on U.S.
                          Labor cost                              Parts cost        product         operators
----------------------------------------------------------------------------------------------------------------
Up to 94 work-hours x $85 per hour = Up to $7,990............              $0           $7,990         $423,470
----------------------------------------------------------------------------------------------------------------

                 Estimated Costs of On-Condition Actions
------------------------------------------------------------------------
           Labor cost              Parts cost        Cost per product
------------------------------------------------------------------------
Up to 40 work-hours x $85 per              $100  Up to $3,500.
 hour = Up to $3,400.
------------------------------------------------------------------------

    The FAA has received no definitive data on which to base the cost
estimates for the on-condition rework specified in this proposed AD.

Authority for This Rulemaking

    Title 49 of the United States Code specifies the FAA's authority to
issue rules on aviation safety. Subtitle I, section 106, describes the
authority of the FAA Administrator. Subtitle VII: Aviation Programs,
describes in more detail the scope of the Agency's authority.
    The FAA is issuing this rulemaking under the authority described in
Subtitle VII, Part A, Subpart III, Section 44701: General requirements.
Under that section, Congress charges the FAA with promoting safe flight
of civil aircraft in air commerce by prescribing regulations for
practices, methods, and procedures the Administrator finds necessary
for safety in air commerce. This regulation is within the scope of that
authority because it addresses an unsafe condition that is likely to
exist or develop on products identified in this rulemaking action.

Regulatory Findings

    The FAA determined that this proposed AD would not have federalism
implications under Executive Order 13132. This proposed AD would not
have a substantial direct effect on the States, on the relationship
between the national Government and the States, or on the distribution
of power and responsibilities among the various levels of government.
    For the reasons discussed above, I certify this proposed
regulation:
    (1) Is not a ``significant regulatory action'' under Executive
Order 12866,
    (2) Would not affect intrastate aviation in Alaska, and
    (3) Would not have a significant economic impact, positive or
negative, on a substantial number of small entities under the criteria
of the Regulatory Flexibility Act.

List of Subjects in 14 CFR Part 39

    Air transportation, Aircraft, Aviation safety, Incorporation by
reference, Safety.

The Proposed Amendment

    Accordingly, under the authority delegated to me by the
Administrator, the FAA proposes to amend 14 CFR part 39 as follows:

PART 39--AIRWORTHINESS DIRECTIVES

0
1. The authority citation for part 39 continues to read as follows:

    Authority: 49 U.S.C. 106(g), 40113, 44701.

Sec.  39.13  [Amended]

0
2. The FAA amends Sec.  39.13 by adding the following new airworthiness
directive:

De Havilland Aircraft of Canada Limited (Type Certificate Previously
Held by Bombardier, Inc.): Docket No. FAA-2022-1151; Project
Identifier MCAI-2020-01603-T.

(a) Comments Due Date

    The FAA must receive comments on this airworthiness directive
(AD) by October 24, 2022.

(b) Affected ADs

    None.

(c) Applicability

    This AD applies to De Havilland Aircraft of Canada Limited (Type
Certificate previously held by Bombardier, Inc.) Model DHC-8-400, -
401, and -402 airplanes, certificated in any category, having serial
numbers 4001, 4003, and subsequent.

(d) Subject

    Air Transport Association (ATA) of America Code 28, Fuel System.

(e) Unsafe Condition

    This AD was prompted by a report that electrical bonding jumpers
had been installed on fuel scavenge lines even after the removal was
required by previous AD rulemaking and electrical bonding jumpers
may have been installed in production or in service at other
locations. The FAA is issuing this AD to address altered electrical
bonding paths, which may lead to lightning strike-induced ignition
of the fuel tank.

(f) Compliance

    Comply with this AD within the compliance times specified,
unless already done.

(g) Definition

    For the purposes of this AD, ``prohibited tasks'' are identified
as any task identified in paragraph (j) of this AD and any procedure
or task that specifies fuel tank access using non-manufacturer-
approved procedures.

(h) Inspection and Modification

    (1) For airplanes having serial numbers 4001, and 4003 through
4118 inclusive: Within 6,000 flight hours or 36 months after the
effective date of this AD, whichever occurs first, inspect wing
stations  79.7,  136.3,  173.2,
and  299.019 in the left and right wings for the
presence of brackets and electrical bonding jumpers installed on the
fuel scavenge and vent lines, in accordance with the Accomplishment
Instructions of Bombardier Service Bulletin 84-28-29, dated October
1, 2018. If installed, remove or modify the electrical bonding
jumpers and brackets as applicable, before further flight, in
accordance with the Accomplishment Instructions of Bombardier
Service Bulletin 84-28-29, dated October 17, 2018.
    (2) For airplanes having serial numbers 4119 through 4597
inclusive: Within 6,000 flight hours or 36 months after the
effective date of this AD, whichever occurs first, inspect wing
stations  79.7,  136.3, and
173.2 in the left and right wings for the presence of brackets and
electrical bonding jumpers on the fuel scavenge and vent lines, in
accordance with the Accomplishment Instructions of Bombardier
Service Bulletin 84-28-29, dated October 1, 2018. If installed,
remove or modify the electrical bonding jumpers and brackets as
applicable, before further flight, in accordance with the
Accomplishment Instructions of Bombardier Service Bulletin 84-28-30,
dated October 17, 2018.

(i) Verification and Rework for the Existing Maintenance Program

    (1) For airplanes having serial numbers 4001, and 4003 through
4597 inclusive, on which the actions required by paragraph (h)(1) or
(2) of this AD have been done before the effective date of this AD:
Within 60 days after the effective date of this AD, review the
airplane maintenance records to confirm if any of the prohibited
tasks (defined in paragraph (g) of this AD) were accomplished during
or after compliance with paragraph (h)(1) or (2) of this AD. If any
of the

prohibited tasks were accomplished during or after compliance with
paragraph (h)(1) or (2) of this AD, or if it cannot be conclusively
confirmed that they were not accomplished during or after compliance
with paragraph (h)(1) or (2) of this AD: Within 6,000 flight hours
or 36 months after the effective date of this AD, whichever occurs
first, do the actions required by paragraph (h)(1) or (2) of this
AD, as applicable.
    (2) For airplanes having serial numbers 4598 and subsequent,
with an airplane date of manufacture, as identified on the
identification plate of the airplane, dated before the effective
date of this AD: Within 60 days after the effective date of this AD,
review the airplane maintenance records to confirm if any of the
prohibited tasks (defined in paragraph (g) of this AD) were
accomplished on or after the airplane date of manufacture. If any of
the prohibited tasks were accomplished on or after the airplane date
of manufacture, or if it cannot be conclusively confirmed that they
were not accomplished on or after the airplane date of manufacture:
Within 6,000 flight hours or 36 months after the effective date of
this AD, whichever occurs first, obtain and follow instructions for
rework using a method approved by the Manager, New York ACO Branch,
FAA; or Transport Canada Civil Aviation (TCCA); or De Havilland
Aircraft of Canada Limited's TCCA Design Approval Organization
(DAO). If approved by the DAO, the approval must include the DAO-
authorized signature.

(j) Maintenance Task Prohibitions

    For all airplanes: As of the effective date of this AD, comply
with the prohibitions specified in paragraphs (j)(1) and (2) of this
AD.
    (1) It is prohibited to use the Bombardier aircraft maintenance
manual (AMM) tasks identified in paragraphs (j)(1)(i) through (vii)
of this AD, which are specified in the Bombardier Q400, PSM 1-84-2,
Revision 63, dated October 5, 2018, or earlier revisions of these
tasks. Temporary Revisions (TRs) including these AMM tasks, dated
November 2, 2018, or earlier, are also prohibited for use except as
specified in paragraph (j)(1)(i) through (vii) of this AD.
    (i) Task 28-12-01-000-801, Removal of the Inboard Vent Line,
with the exception of (Bombardier) Q400 Dash 8 AMM TR 28-170, dated
November 2, 2018.
    (ii) Task 28-12-01-400-801, Installation of the Inboard Vent
Line, with the exception of (Bombardier) Q400 Dash 8 AMM TR 28-171,
dated November 2, 2018.
    (iii) Task 28-11-06-000-801, Removal of the Motive Flow Lines,
with the exception of (Bombardier) Q400 Dash 8 AMM TR 28-166, dated
November 2, 2018.
    (iv) Task 28-11-06-400-801, Installation of the Motive Flow
Lines, with the exception of (Bombardier) Q400 Dash 8 AMM TR 28-167,
dated November 2, 2018.
    (v) Task 28-11-16-000-801, Removal of the Scavenge Flow Lines,
with the exception of (Bombardier) Q400 Dash 8 AMM TR 28-168, dated
November 2, 2018.
    (vi) Task 28-11-16-400-801, Installation of the Scavenge Flow
Lines, with the exception of (Bombardier) Q400 Dash 8 AMM TR 28-169
dated November 2, 2018.
    (vii) Task 28-10-00-280-806, Detailed Inspection of the
Teflon\TM\ Sleeve on the Fuel Tank Vent Line, LH and RH (FSL
#284000-406), with the exception of (Bombardier) Q400 Dash 8 AMM TR
28-163, dated August 1, 2018.
    (2) It is prohibited to use the Bombardier Q400 Dash 8
Maintenance Task Card Manual (MTCM) task cards identified in
paragraphs (j)(2)(i) and (ii) of this AD that are specified in the
Bombardier Q400 Dash 8 MTCM, PSM 1-84-7TC, Revision 43, dated May 5,
2018, or earlier revisions or amendments of these task cards. MTCM
task card revisions or amendments dated August 1, 2018, or earlier,
are also prohibited for use, except as specified in paragraphs
(j)(2)(i) and (ii) of this AD.
    (i) Bombardier Q400 Dash 8 MTCM Maintenance Task Card 000-28-
520-704 (Config A01), Detailed Inspection of the Teflon\TM\ Sleeve
on the Fuel Tank Vent Line (LH), with the exception of (Bombardier)
Q400 Dash 8 MTCM Maintenance Task Card 000-28-520-704 (Config A01),
Detailed Inspection of the Teflon\TM\ Sleeve on the Fuel Tank Vent
Line (LH), Revision 43, Amendment 0001, dated August 1, 2018.
    (ii) Bombardier Q400 Dash 8 MTCM Maintenance Task Card 000-28-
620-704 (Config A01), Detailed Inspection of the Teflon\TM\ Sleeve
on the Fuel Tank Vent Line (RH), with the exception of (Bombardier)
Q400 Dash 8 MTCM Maintenance Task Card 000-28-620-704 (Config A01),
Detailed Inspection of the Teflon\TM\ Sleeve on the Fuel Tank Vent
Line (RH), Revision 43, Amendment 0001, dated August 1, 2018.

(k) Other FAA AD Provisions

    The following provisions also apply to this AD:
    (1) Alternative Methods of Compliance (AMOCs): The Manager, New
York ACO Branch, FAA, has the authority to approve AMOCs for this
AD, if requested using the procedures found in 14 CFR 39.19. In
accordance with 14 CFR 39.19, send your request to your principal
inspector or responsible Flight Standards Office, as appropriate. If
sending information directly to the manager of the certification
office, send it to ATTN: Program Manager, Continuing Operational
Safety, FAA, New York ACO Branch, 1600 Stewart Avenue, Suite 410,
Westbury, NY 11590; telephone<PHONE_NUMBER>. Before using any
approved AMOC, notify your appropriate principal inspector, or
lacking a principal inspector, the manager of the responsible Flight
Standards Office.
    (2) Contacting the Manufacturer: For any requirement in this AD
to obtain instructions from a manufacturer, the instructions must be
accomplished using a method approved by the Manager, New York ACO
Branch, FAA; or TCCA; or De Havilland Aircraft of Canada Limited's
TCCA DAO. If approved by the DAO, the approval must include the DAO-
authorized signature.

(l) Related Information

    (1) Refer to Mandatory Continuing Airworthiness Information
(MCAI) TCCA AD CF-2020-01, dated January 14, 2020, for related
information. This MCAI may be found in the AD docket at
regulations.gov by searching for and locating Docket No. FAA-2022-
1151.
    (2) For more information about this AD, contact Joseph
Catanzaro, Aerospace Engineer, Airframe and Propulsion Section, FAA,
New York ACO Branch, 1600 Stewart Avenue, Suite 410, Westbury, NY
11590; telephone<PHONE_NUMBER>; email [email protected].
    (3) For service information identified in this AD, contact De
Havilland Aircraft of Canada Limited, Dash 8 Series Customer
Response Centre, 5800 Explorer Drive, Mississauga, Ontario, L4W 5K9,
Canada; North America (toll-free):<PHONE_NUMBER>, Direct: 647-277-
5820; email dehavilland.com">[email protected]dehavilland.com; internet dehavilland.com. You may
view this service information at the FAA, Airworthiness Products
Section, Operational Safety Branch, 2200 South 216th St., Des
Moines, WA. For information on the availability of this material at
the FAA, call<PHONE_NUMBER>.

    Issued on August 31, 2022.
Christina Underwood,
Acting Director, Compliance & Airworthiness Division, Aircraft
Certification Service.
[FR Doc. 2022-19232 Filed 9-8-22; 8:45 am]
BILLING CODE 4910-13-P