[Federal Register Volume 88, Number 215 (Wednesday, November 8, 2023)]
[Proposed Rules]
[Pages 77060-77064]
[FR Doc No: 2023-24328]

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DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2023-2143; Project Identifier MCAI-2023-00088-A]
RIN 2120-AA64

Airworthiness Directives; Diamond Aircraft Industries GmbH
Airplanes

AGENCY: Federal Aviation Administration (FAA), DOT.

ACTION: Notice of proposed rulemaking (NPRM).

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SUMMARY: The FAA proposes to supersede Airworthiness Directive (AD)
2022-21-15, which applies to certain Diamond Aircraft Industries GmbH
(DAI) Model DA 42, DA 42 NG, and DA 42 M-NG airplanes. AD 2022-21-15
requires replacing the rudder T-yoke

axle with an improved rudder T-yoke axle. Since the FAA issued AD 2022-
21-15, the European Union Aviation Safety Agency (EASA) superseded its
mandatory continuing airworthiness information (MCAI) to correct an
unsafe condition on these products. This proposed AD would require, for
certain airplanes, inspecting the rudder steering bracket edge distance
and depending on the inspection results, inspecting the T-yoke bolt
hole for wear and play, and corrective action if necessary. For certain
airplanes this proposed AD would require replacing the rudder T-yoke
bolt (axle) with a serviceable part, and applying torque seal marks on
the rudder T-yoke bolt head, and self-locking nut. For all airplanes
this proposed AD would require repetitively inspecting the torque seal
marks on the rudder T-yoke bolt head for proper alignment and the self-
locking nut for proper installation and corrective action if necessary.
This proposed AD would also prohibit the installation of affected
parts. The FAA is proposing this AD to address the unsafe condition on
these products.

DATES: The FAA must receive comments on this NPRM by December 26, 2023.

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.
    AD Docket: You may examine the AD docket at regulations.gov under
Docket No. FAA-2023-2143; 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 MCAI, any comments received, and other
information. The street address for Docket Operations is listed above.
    Material Incorporated by Reference:
     For service information identified in this NPRM, contact
Diamond Aircraft Industries GmbH, N.A. Otto-Stra[szlig]e 5, A-2700
Wiener Neustadt, Austria; phone: +43 2622 26700; email<EMAIL_ADDRESS>website: diamondaircraft.com.
     You may view this service information at the FAA,
Airworthiness Products Section, Operational Safety Branch, 901 Locust,
Kansas City, MO 64106. For information on the availability of this
material at the FAA, call<PHONE_NUMBER>. It is also available at
regulations.gov under Docket No. FAA-2023-2143.

FOR FURTHER INFORMATION CONTACT: Penelope Trease, Aviation Safety
Engineer, FAA, 1600 Stewart Avenue, Suite 410, Westbury, NY 11590;
phone:<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-2023-2143; Project Identifier
MCAI-2023-00088-A'' 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:
Penelope Trease, Aviation Safety Engineer, FAA, 1600 Stewart Avenue,
Suite 410, Westbury, NY 11590. Any commentary that the FAA receives
which is not specifically designated as CBI will be placed in the
public docket for this rulemaking.

Background

    The FAA issued AD 2022-21-15, Amendment 39-22214 (87 FR 67541,
November 9, 2022) (AD 2022-21-15), for certain DAI Model DA 42, DA 42
NG, and DA 42 M-NG airplanes. AD 2022-21-15 was prompted by MCAI
originated by EASA, which is the Technical Agent for the Member States
of the European Union. EASA issued EASA AD 2019-0302, dated December
13, 2019 (EASA AD 2019-0302) to correct an unsafe condition on DAI
Model DA 42, DA 42 NG, and DA 42 M-NG airplanes. EASA AD 2019-0302
described the unsafe condition as reports of a loose rudder T-yoke axle
nut on DAI Model DA 42 airplanes and the need for new inspections for
correct installation of the self-locking nut to the rudder T-yoke
standard bolt LN 9037 (dimensions M6x90), and depending on findings,
accomplishment of applicable corrective action(s) and replacement of
the self-locking nut. EASA AD 2019-0302 also provided an optional
terminating action for the repetitive inspections. This condition, if
not detected and corrected, could lead to vertical movement of the
bolt, possibly resulting in reduced rudder control of the airplane.
    AD 2022-21-15 requires replacing the rudder T-yoke axle with an
improved rudder T-yoke bolt. The FAA issued AD 2022-21-15 to prevent
movement of the T-yoke bolt.

Actions Since AD 2022-21-15 Was Issued

    Since the FAA issued AD 2022-21-15, EASA superseded EASA AD 2019-
0302 and issued EASA AD 2023-0013, dated January 18, 2023 (EASA AD
2023-0013) (referred to after this as the MCAI) to correct an unsafe
condition on all DAI Model DA 42, DA 42 M, DA 42 NG, and DA 42 M-NG
airplanes.
    The MCAI states that since EASA AD 2019-0302 was issued, DAI
published revised service information to provide additional inspection
and modification instructions. The MCAI requires a one-time inspection
of the rudder steering bracket for insufficient edge distance or wear,
replacement of rudder T-yoke standard bolt LN 9037 (dimensions M6x90)
with rudder T-yoke bolt part number (P/N) D60-5320-00-32, repetitive
inspections of rudder T-yoke bolt P/N D60-5320-00-32 for correct
installation, corrective actions if necessary, and prohibits
installation of

rudder T-yoke standard bolt LN 9037 (dimensions M6x90). The affected
and serviceable parts, identified as ``bolt'' in EASA AD 2023-0013,
were referred to as ``axle'' in EASA AD 2019-0302.
    This condition, if not detected and corrected, could lead to
blockage or loss of rudder control. You may examine the MCAI in the AD
docket at regulations.gov under Docket No. FAA-2023-2143.

Related Service Information Under 1 CFR Part 51

    The FAA reviewed Diamond Aircraft Mandatory Service Bulletin DAI
MSB 42-143/1 and DAI MSB 42NG-086/1, dated January 25, 2022 (issued as
one document), published with DAI Work Instruction WI-MSB 42-143 and
WI-MSB 42NG-086, Revision 3, dated November 15, 2022 (issued as one
document) attached. The service bulletin specifies compliance with the
work instruction, which contains procedures for inspecting the hole
position and condition in the rudder steering bracket.
    The FAA also reviewed Diamond Aircraft Recommended Service Bulletin
DAI RSB 42-139 and DAI RSB 42NG-081, dated October 21, 2019 (issued as
one document), published with DAI Work Instruction WI-RSB 42-139 and
WI-RSB 42NG-081, Revision 2, dated November 15, 2022 (issued as one
document) attached. The service bulletin specifies compliance with the
work instruction, which contains procedures for replacement of the
rudder T-yoke axle with an improved (additional retaining pin) rudder
T-yoke axle.
    In addition, the FAA reviewed Diamond Aircraft Mandatory Service
Bulletin DAI MSB 42-146 and DAI MSB 42NG-087, dated November 15, 2022,
(issued as one document). The service bulletin specifies the serial
numbers for airplanes identified as Group 2 in the requirements of this
proposed AD. 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 ADDRESSES.

FAA's Determination

    These products have been approved by the aviation authority of
another country and are approved for operation in the United States.
Pursuant to the FAA's bilateral agreement with this State of Design
Authority, it has notified the FAA of the unsafe condition described in
the MCAI and service information described above. The FAA is issuing
this NPRM after determining that 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 retain the requirement of AD 2022-21-15 to
replace rudder T-yoke axle part number P/N LN 9037-M6x90 with rudder T-
yoke axle P/N D60-5320-00-32. This proposed AD would require, for
certain airplanes, inspecting the rudder steering bracket edge distance
and depending on the inspection results, inspecting the T-yoke bolt
hole for wear and play, and corrective actions if necessary. For
certain airplanes, this proposed AD would also require applying torque
seal marks on the T-yoke bolt head and self-locking nut. For all
airplanes, this proposed AD would require repetitively inspecting the
torque seal marks on the T-yoke bolt head for proper alignment, and the
self-locking nut for proper installation, and corrective action if
necessary. This proposed AD would also prohibit the installation of
affected parts.

Differences Between This Proposed AD and the MCAI

    The MCAI applies to DAI Model DA 42 M airplanes and this proposed
AD does not because those airplanes do not have an FAA type
certificate.
    Paragraph (3) of the MCAI specifies to contact the manufacturer for
repair instructions and paragraph (7) of the MCAI specifies to contact
the manufacturer for corrective actions if any discrepancy is found,
but for both of those corrective actions, this proposed AD would
require contacting either the Manager, International Validation Branch,
FAA; EASA; or Diamond's EASA Design Organization Approval (DOA)
instead. If approved by the DOA, the approval must include the DOA-
authorized signature.

Costs of Compliance

    The FAA estimates that this AD, if adopted as proposed, would
affect 205 airplanes of U.S. registry.
    The FAA estimates the following costs to comply with this proposed
AD:

                                                 Estimated Costs
----------------------------------------------------------------------------------------------------------------
                                                                                Cost on U.S.
              Action                    Labor cost        Parts cost      Cost per product        operators
----------------------------------------------------------------------------------------------------------------
Inspection of rudder steering      0.25 work-hour x                 $0  $21.25.............  $4,356.25.
 bracket edge distance.             $85 per hour =
                                    $21.25.
Replacement of rudder t-yoke bolt  0.50 work-hour x                 82  $124.50............  $25,522.50.
 P/N LN 9037 with P/N D60-5320-     $85 per hour =
 0032.                              $42.50.
Application of torque seal marks   0.75 work-hour x                 15  $78.75.............  $16,143.75.
 to rudder T-yoke bolt and self-    $85 per hour =
 locking nut.                       $63.75.
Repetitive inspection of torque    0.25 work-hour x                  0  $21.25, per          $4,356.25, per
 seal marks.                        $85 per hour.                        inspection.          inspection.
----------------------------------------------------------------------------------------------------------------

                                               On-Condition Costs
----------------------------------------------------------------------------------------------------------------
                                                                                Cost per
                    Action                                 Labor cost               Parts cost        product
----------------------------------------------------------------------------------------------------------------
Inspection of rudder steering bracket hole for  0.50 work-hour x $85 per hour =               $0          $42.50
 wear and play, if edge distance is equal to     $42.50.
 or greater than 11 millimeters.
----------------------------------------------------------------------------------------------------------------

    Since the replacement or repair instructions could vary
significantly from airplane to airplane if discrepancies are found
during the inspections, the FAA has no data to determine the number of
airplanes that would need follow-on actions or what the cost per
airplane would be.

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 that the 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:
0
a. Removing Airworthiness Directive 2022-21-15, Amendment 39-22214 (87
FR 67541, November 9, 2022); and
0
b. Adding the following new airworthiness directive:

Diamond Aircraft Industries GmbH: Docket No. FAA-2023-2143; Project
Identifier MCAI-2023-00088-A.

(a) Comments Due Date

    The FAA must receive comments on this airworthiness directive
(AD) by December 26, 2023.

(b) Affected ADs

    This AD replaces AD 2022-21-15, Amendment 39-22214 (87 FR 67541,
November 9, 2022).

(c) Applicability

    This AD applies to Diamond Aircraft Industries GmbH (DAI) Model
DA 42, DA 42 NG, and DA 42 M-NG airplanes, all serial numbers,
certificated in any category.

(d) Subject

    Joint Aircraft System Component (JASC) Code 2700, Flight Control
System.

(e) Unsafe Condition

    This AD was prompted by reports of a loose rudder T-yoke bolt
nut, excessive wear of the hole, and insufficient hole edge margin
at the rudder steering bracket. The FAA is issuing this AD to detect
and correct vertical movement of the T-yoke bolt (axle). The unsafe
condition, if not addressed, could lead to blockage or loss of
rudder control and result in reduced control of the airplane.

(f) Compliance

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

(g) Definitions

    For the purposes of this AD, the following definitions apply.
    (1) Group 1 airplanes: Airplanes with serial numbers specified
in Technical Details, section I.2, of Diamond Aircraft Mandatory
Service Bulletin DAI MSB 42-143/1 and DAI MSB 42NG-086/1, dated
January 25, 2022 (issued as one document), published with DAI Work
Instruction WI-MSB 42-143 and WI-MSB 42NG-086, Revision 3, dated
November 15, 2022 (issued as one document) attached.
    (2) Group 2 airplanes: Airplanes with serial numbers specified
in Technical Details, section I.2, of Diamond Aircraft Mandatory
Service Bulletin DAI MSB 42-146 and DAI MSB 42NG-087, dated November
15, 2022, (issued as one document).
    (3) Group 3 airplanes: Airplanes that are not in Group 1 or
Group 2.
    (4) Depending on the serial number, a Group 1 airplane can also
be a Group 2 airplane.

(h) Inspections and Corrective Actions

    For Group 1 and Group 2 airplanes: Do the inspection required by
paragraph (h)(1) of this AD at the compliance time specified in
paragraph (h)(1) of this AD and the applicable corrective actions
specified in paragraphs (h)(2) through (4) of this AD at the
applicable compliance times specified in paragraphs (h)(2) through
(4) of this AD.
    (1) Within 200 hours time-in-service (TIS) or 9 months after the
effective date of this AD, whichever occurs first, inspect the
rudder steering bracket edge distance by measuring in accordance
with step 6 of the Instructions, Section III, in Diamond Aircraft
Work Instruction WI-MSB 42-143 and WI-MSB 42NG-086, Revision 3,
dated November 15, 2022 (issued as one document) attached to Diamond
Aircraft Mandatory Service Bulletin DAI MSB 42-143/1 and DAI MSB
42NG-086/1, dated January 25, 2022 (issued as one document).
    (2) If, during the inspection required by paragraph (h)(1) of
this AD, the measured distance is equal to or greater than 11
millimeters (mm), before further flight, inspect the hole in the
rudder steering bracket for wear and play in accordance with step 11
of the Instructions, Section III, in Diamond Aircraft Work
Instruction WI-MSB 42-143 and WI-MSB 42NG-086, Revision 3, dated
November 15, 2022 (issued as one document) attached to Diamond
Aircraft Mandatory Service Bulletin DAI MSB 42-143/1 and DAI MSB
42NG-086/1, dated January 25, 2022 (issued as one document).
    (3) If, during the inspection required by paragraph (h)(1) of
this AD, the measured distance is less than 11 mm, before further
flight, contact the Manager, International Validation Branch, FAA;
the European Union Aviation Safety Agency (EASA); or Diamond's EASA
Design Organization Approval (DOA) for repair instructions, and
within the compliance time specified therein, complete the repair.
If approved by the DOA, the approval must include the DOA-authorized
signature.
    (4) If, during the inspection required by paragraph (h)(2) of
this AD, a worn or enlarged hole is found on the rudder steering
bracket, or if the T-yoke bolt is found to have play, before further
flight, contact the Manager, International Validation Branch, FAA;
EASA; or Diamond's EASA DOA for instructions (repair or replacement
of the rudder steering bracket), and within the compliance time
specified therein, do the instructions. If approved by the DOA, the
approval must include the DOA-authorized signature.

(i) Replacement

    For Group 2 airplanes: Concurrently with the inspection required
by paragraph (h)(1) of this AD, replace the rudder T-yoke bolt part
number (P/N) LN 9037-M6x90 with rudder T-yoke bolt P/N D60-5320-00-
32, and apply torque seal marks on the rudder T-yoke bolt head and
self-locking nut, in accordance with steps 14, 15, and 18 of the
Instructions, Section III, in Diamond Aircraft Work

Instruction WI-RSB 42-139 and WI-RSB 42NG-081, Revision 2, dated
November 15, 2022 (issued as one document) attached to Diamond
Aircraft Recommended Service Bulletin DAI RSB 42-139 and DAI RSB
42NG-081, dated October 21, 2019 (issued as one document).

(j) Repetitive Inspections

    (1) For Group 1 and Group 2 airplanes: Within 200 hours TIS
after the inspection required by paragraph (h)(1) of this AD and,
thereafter, at intervals not to exceed 200 hours TIS, inspect the
torque seal marks on the T-yoke bolt head and self-locking nut for
proper alignment.
    Note 1 to paragraph (j)(1): This can be accomplished using DAI
Maintenance Manual (AMM) Temporary Revision (TR) AMM-TR-M[Auml]M-42-
1213/a, dated June 7, 2022 (DAI AMM TR AMM-TR-M[Auml]M-42-1213/a).
    (2) For Group 3 airplanes: Within 200 hours TIS after the
effective date of this AD, and thereafter at intervals not to exceed
200 hours TIS, inspect the torque seal marks on the T-yoke bolt head
and self-locking nut for proper alignment.
    Note 2 to paragraph (j)(2): This can be accomplished using DAI
AMM TR AMM-TR-M[Auml]M-42-1213/a.
    (3) For all airplanes: If, during any inspection required by
paragraph (j)(1) or (j)(2) of this AD, it is found that the torque
seal marks are not properly aligned, before further flight, contact
the Manager, International Validation Branch, FAA; EASA; or
Diamond's EASA DOA for approved repair instructions, and within the
compliance time specified therein, accomplish those instructions
accordingly. If approved by the DOA, the approval must include the
DOA-authorized signature.

(k) Parts Installation Prohibition

    For all airplanes: As of the effective date of this AD, do not
install on any airplane a rudder T-yoke bolt P/N LN 9037-M6x90.

(l) Credit for Previous Actions

    (1) You may take credit for the actions required by paragraphs
(h)(1) and (2) of this AD if the actions were done before the
effective date of this AD using any of the work instructions
specified in paragraphs (l)(1)(i), (ii), or (iii) of this AD.
    (i) Diamond Aircraft Work Instruction WI-MSB 42-143 and WI-MSB
42NG-086, Revision 0, dated December 23, 2021 (issued as one
document) attached to Diamond Aircraft Mandatory Service Bulletin
DAI MSB 42-143 and DAI MSB 42NG-086, dated December 23, 2021 (issued
as one document).
    (ii) Diamond Aircraft Work Instruction WI-MSB 42-143 and WI-MSB
42NG-086, Revision 1, dated January 25, 2022 (issued as one
document) attached to Diamond Aircraft Mandatory Service Bulletin
DAI MSB 42-143/1 and DAI MSB 42NG-086/1, dated January 25, 2022
(issued as one document).
    (iii) Diamond Aircraft Work Instruction WI-MSB 42-143 and WI-MSB
42NG-086, Revision 2, dated March 10, 2022 (issued as one document)
attached to Diamond Aircraft Mandatory Service Bulletin DAI MSB 42-
143/1 and DAI MSB 42NG-086/1, dated January 25, 2022 (issued as one
document).
    (2) You may take credit for the rudder T-yoke bolt replacement
required by paragraph (i) of this AD if that action was done before
the effective date of this AD using the Diamond Aircraft Work
Instruction WI-RSB 42-139 and WI-RSB 42NG-081, Revision 1, dated
October 24, 2019 (issued as one document) attached to Diamond
Aircraft Recommended Service Bulletin DAI RSB 42-139 and DAI RSB
42NG-081, dated October 21, 2019 (issued as one document).

(m) Alternative Methods of Compliance (AMOCs)

    The Manager, International Validation 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 local Flight
Standards District Office, as appropriate. If sending information
directly to the International Validation Branch, send it to the
attention of the person identified in paragraph (n)(2) of this AD or
email to: [email protected]. If mailing information, also
submit information by email. Before using any approved AMOC, notify
your appropriate principal inspector, or lacking a principal
inspector, the manager of the responsible Flight Standards Office.

(n) Additional Information

    (1) Refer to EASA AD 2023-0013, dated January 18, 2023, for
related information. This EASA AD may be found in the AD docket at
regulations.gov under Docket No. FAA-2023-2143.
    (2) For more information about this AD, contact Penelope Trease,
Aviation Safety Engineer, FAA, 1600 Stewart Avenue, Suite 410,
Westbury, NY 11590; phone:<PHONE_NUMBER>; email:
[email protected].
    (3) Service information identified in this AD that is not
incorporated by reference is available at the addresses specified in
paragraphs (o)(3) and (4) of this AD.

(o) Material Incorporated by Reference

    (1) The Director of the Federal Register approved the
incorporation by reference (IBR) of the service information listed
in this paragraph under 5 U.S.C. 552(a) and 1 CFR part 51.
    (2) You must use this service information as applicable to do
the actions required by this AD, unless the AD specifies otherwise.
    (i) Diamond Aircraft Mandatory Service Bulletin DAI MSB 42-143/1
and DAI MSB 42NG-086/1, dated January 25, 2022 (issued as one
document), published with DAI Work Instruction WI-MSB 42-143 and WI-
MSB 42NG-086, Revision 3, dated November 15, 2022 (issued as one
document) attached.
    (ii) Diamond Aircraft Mandatory Service Bulletin DAI MSB 42-146
and DAI MSB 42NG-087, dated November 15, 2022, (issued as one
document).
    (iii) Diamond Aircraft Recommended Service Bulletin DAI RSB 42-
139 and DAI RSB 42NG-081, dated October 21, 2019 (issued as one
document), published with DAI Work Instruction WI-RSB 42-139 and WI-
RSB 42NG-081, Revision 2, dated November 15, 2022 (issued as one
document) attached.
    (3) For service information identified in this AD, contact
Diamond Aircraft Industries GmbH, N.A. Otto-Stra[szlig]e 5, A-2700
Wiener Neustadt, Austria; phone: +43 2622 26700; email:
<EMAIL_ADDRESS>website:
diamondaircraft.com.
    (4) You may view this service information at the FAA,
Airworthiness Products Section, Operational Safety Branch, 901
Locust, Kansas City, MO 64106. For information on the availability
of this material at the FAA, call<PHONE_NUMBER>. It is also
available at regulations.gov under Docket No. FAA-2023-2143.
    (5) You may view this material at the National Archives and
Records Administration (NARA). For information on the availability
of this material at NARA, visit www.archives.gov/federal-register/cfr/ibr-locations or email [email protected].

    Issued on October 30, 2023.
Ross Landes,
Deputy Director for Regulatory Operations, Compliance & Airworthiness
Division, Aircraft Certification Service.
[FR Doc. 2023-24328 Filed 11-7-23; 8:45 am]
BILLING CODE 4910-13-P