[Federal Register Volume 78, Number 176 (Wednesday, September 11, 2013)]
[Proposed Rules]
[Pages 55660-55662]
[FR Doc No: 2013-22145]

=======================================================================
-----------------------------------------------------------------------

DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2013-0705; Directorate Identifier 2013-NM-052-AD]
RIN 2120-AA64

Airworthiness Directives; Bombardier, Inc. Airplanes

AGENCY: Federal Aviation Administration (FAA), DOT.

ACTION: Notice of proposed rulemaking (NPRM).

-----------------------------------------------------------------------

SUMMARY: We propose to adopt a new airworthiness directive (AD) for
certain Bombardier, Inc. Model BD-700-1A10 airplanes. This proposed AD
was prompted by a report that the manufacturer has determined that some
completion centers used the heater/brake monitoring unit (HBMU) logic
circuit to control the line voltage of the drain mast heaters. Since
the drain mast heaters are connected in parallel with the number 2
pitot static (PS) probe heater circuit, a number 2 PS probe heater
failure may not be detected by the fault monitoring capabilities of the
HBMU. This proposed AD would require a modification of the air data
probes and sensors. We are proposing this AD to detect and correct an
unannunciated failure of two PS probe heaters, which could affect
controllability of the airplane in icing conditions.

DATES: We must receive comments on this proposed AD by October 28,
2013.

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 W12-140, 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>; email
<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, WA. For
information on the availability of this material at the FAA, call 425-
227-1221.

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 MCAI, 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: Assata Dessaline, Aerospace Engineer,
Avionics and Flight Test Branch, ANE-172, 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-2013-0705;
Directorate Identifier 2013-NM-052-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

    Transport Canada Civil Aviation (TCCA), which is the aviation
authority for Canada, has issued Canadian Airworthiness Directive CF-
2012-32, dated December 13, 2013 (referred to after this as the
Mandatory Continuing Airworthiness Information, or ``the MCAI''), to
correct an unsafe condition for the specified products. The MCAI
states:

    The aeroplane manufacturer has determined that some completion
centers used the Heater/Brake Monitoring Unit (HBMU) logic circuit
to control the line voltage of the drain mast heaters. This same
logic circuit is also used to control the line voltage of the number
2 pitot static (PS) probe heater. Since the drain mast heaters are
connected in parallel with the number 2 PS probe heater circuit, a
number 2 PS probe heater failure may not be detected by the fault
monitoring capabilities of the HBMU.
    The unannunciated failure of two PS probe heaters could
adversely affect the aeroplane's flight characteristics in icing
conditions.
    This [Canadian] AD mandates a modification to the existing drain
mast heater wiring to correct the fault-monitoring capabilities of
the HBMU and eliminate the potential dormant failure of the number 2
PS probe heater.

You may obtain further information by examining the MCAI in the AD
docket.

Relevant Service Information

    Bombardier, Inc. has issued Service Bulletin 700-30-021, Revision
01, dated November 21, 2012. The actions described in this service
information are intended to correct the unsafe condition identified in
the MCAI.

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 Proposed AD and the MCAI or Service
Information

    This AD applies only to airplanes that have been modified by any
FAA supplemental type certificate (STC) specified in table 1 of
paragraph 1.A., ``Effectivity,'' of Bombardier Service Bulletin 700-30-
021, Revision 01, dated November 21, 2012.

Costs of Compliance

    We estimate that this proposed AD affects 32 airplanes of U.S.
registry.
    We estimate the following costs to comply with this proposed AD:

                                                 Estimated Costs
----------------------------------------------------------------------------------------------------------------
                                                                                Cost on U.S.
              Action                    Labor cost           Parts cost      Cost per product      operators
----------------------------------------------------------------------------------------------------------------
Modification.....................  35 work-hours x $85                 $0             $2,975            $95,200
                                    per hour =
----------------------------------------------------------------------------------------------------------------

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);
    3. Will not affect intrastate aviation in Alaska; and
    4. 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

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 AD:

Bombardier, Inc.: Docket No. FAA-2013-0705; Directorate Identifier
2013-NM-052-AD.

(a) Comments Due Date

    We must receive comments by October 28, 2013.

(b) Affected ADs

    None.

(c) Applicability

    (1) This AD applies to Bombardier, Inc. Model BD-700-1A10
airplanes, certificated in any category, equipped with any
electrical wiring heater current/brake temperature monitor unit
(HBMU) installed in accordance with any FAA supplemental type
certificate specified in table 1 of paragraph 1.A., ``Effectivity,''
of Bombardier Service Bulletin 700-30-021, Revision 01, dated
November 21, 2012.
    (2) For airplanes on which the applicable service request for
product support action (SRPSA) specified in table 3 and table 4 of
paragraph 1.A., ``Effectivity,'' of Bombardier Service Bulletin 700-
30-021, Revision 01, dated November 21, 2012, has been incorporated,
the requirements of this AD have been met.

(d) Subject

    Air Transport Association (ATA) of America Code 30, Ice and Rain
Protection.

(e) Reason

    This AD was prompted by a report that the manufacturer has
determined that some completion centers used the HBMU logic circuit
to control the line voltage of the drain mast heaters. This same
logic circuit is also used to control the line voltage of the number
2 pitot static (PS) probe heater. Since the drain mast heaters are
connected in parallel with the number 2 PS probe heater circuit, a
number 2 PS probe heater failure may not be detected by the fault
monitoring capabilities of the HBMU. We are issuing this AD to
detect and correct an unannunciated failure of two PS probe heaters,
which could affect controllability of the airplane in icing
conditions.

(f) Compliance

    You are responsible for having the actions required by this AD
performed within the compliance times specified, unless the actions
have already been done.

(g) Modification

    Within 800 flight hours or 15 months after the effective date of
this AD, whichever occurs first: Modify the air data probes and
sensors, in accordance with the Accomplishment Instructions of
Bombardier Service Bulletin 700-30-021, Revision 01, dated November
21, 2012.

(h) Credit for Previous Actions

    This paragraph provides credit for actions required by paragraph
(g) of this AD, if those actions were performed before the effective
date of this AD using Bombardier Service Bulletin 700-30-021, dated
August 28, 2012.

(i) Other FAA AD Provisions

    The following provisions also apply to this AD:
    (1) Alternative Methods of Compliance (AMOCs): The Manager, New
York Aircraft Certification Office (ACO), ANE-170, 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 local Flight
Standards District Office, as appropriate. If sending information
directly to the ACO, send it to ATTN: Program Manager, Continuing
Operational Safety, FAA, New York ACO, 1600 Stewart Avenue, Suite
410, Westbury, New York 11590; telephone<PHONE_NUMBER>; fax 516-794-
5531. Before using any approved AMOC, notify your appropriate
principal inspector, or lacking a principal inspector, the manager
of the local flight standards district office/certificate holding
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.

(j) Related Information

    (1) Refer to Mandatory Continuing Airworthiness Information
(MCAI) Canadian Airworthiness Directive CF-2012-32, dated December
13, 2012. The MCAI can be found in the AD docket on the Internet at
http://www.regulations.gov.
    (2) For service information identified in this AD, contact
Bombardier, Inc., 400 C[ocirc]te-

Vertu Road West, Dorval, Qu[eacute]bec H4S 1Y9, Canada; telephone
514-855-5000; fax<PHONE_NUMBER>; email<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, WA. For information on
the availability of this material at the FAA, call<PHONE_NUMBER>.

    Issued in Renton, Washington, on August 30, 2013.
Stephen P. Boyd,
Acting Manager, Transport Airplane Directorate, Aircraft Certification
Service.
[FR Doc. 2013-22145 Filed 9-10-13; 8:45 am]
BILLING CODE 4910-13-P