
[Federal Register Volume 88, Number 215 (Wednesday, November 8, 2023)]
[Proposed Rules]
[Pages 77060-77064]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[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

[[Page 77061]]

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21-15, the European Union Aviation Safety Agency (EASA) superseded its 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: (202) 493-2251.
     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: diamondaircraft.com">airworthiness-austria@diamondaircraft.com; 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 (817) 222-5110. 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: (303) 342-1094; 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

[[Page 77062]]

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.
----------------------------------------------------------------------------------------------------------------


[[Page 77063]]

    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

[[Page 77064]]

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: (303) 342-1094; 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: 
diamondaircraft.com">airworthiness-austria@diamondaircraft.com; 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 (817) 222-5110. 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


