Proposed Rule2026-09574
Airworthiness Directives; Diamond Aircraft Industries Inc. Airplanes
Primary source
Metadata and text below are from the Federal Register, a public-domain U.S. government work. Always verify the official published version before relying on it for any legal matter.
Published
May 13, 2026
Issuing agencies
Transportation DepartmentFederal Aviation Administration
Abstract
The FAA proposes to adopt a new airworthiness directive (AD) for all Diamond Aircraft Industries Inc. (DAI) Model DA 40, DA 40 F, and DA 40 NG airplanes. This proposed AD was prompted by several reports of passenger door separation during flight. This proposed AD would require revising the existing airplane flight manual (AFM) to provide the flight crew with revised operating limitations, emergency procedures, and normal operating procedures; inspecting the passenger door latching mechanism and safety hook mechanism areas and performing corrective action, as applicable; inspecting the safety hook, latching bolts, front and rear door guide blocks, canopy and passenger door warning light, carbon hinges, tension spring, retaining block, safety hook push button, latching mechanism spring, gas spring, and door frame; measuring the passenger door handle actuation force; modifying the airplane with placards; replacing the gas spring; and replacing the hook assembly, retaining block, door guide blocks, and door sealant if necessary. The FAA is proposing this AD to address the unsafe condition on these products.
Full Text
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<title>Federal Register, Volume 91 Issue 92 (Wednesday, May 13, 2026)</title>
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[Federal Register Volume 91, Number 92 (Wednesday, May 13, 2026)]
[Proposed Rules]
[Pages 26952-26955]
From the Federal Register Online via the Government Publishing Office [<a href="http://www.gpo.gov">www.gpo.gov</a>]
[FR Doc No: 2026-09574]
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DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 39
[Docket No. FAA-2026-4633; Project Identifier MCAI-2025-01173-A]
RIN 2120-AA64
Airworthiness Directives; Diamond Aircraft Industries 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 all Diamond Aircraft Industries Inc. (DAI) Model DA 40, DA 40 F,
and DA 40 NG airplanes. This proposed AD was prompted by several
reports of passenger door separation during flight. This proposed AD
would require revising the existing airplane flight manual (AFM) to
provide the flight crew with revised operating limitations, emergency
procedures, and normal operating procedures; inspecting the passenger
door latching mechanism and safety hook mechanism areas and performing
corrective action, as applicable; inspecting the safety hook, latching
bolts, front and rear door guide blocks, canopy and passenger door
warning light, carbon hinges, tension spring, retaining block, safety
hook push button, latching mechanism spring, gas spring, and door
frame; measuring the passenger door handle actuation force; modifying
the airplane with placards; replacing the gas spring; and replacing the
hook assembly, retaining block, door guide blocks, and door sealant if
necessary. The FAA is proposing this AD to address the unsafe condition
on these products.
DATES: The FAA must receive comments on this NPRM by June 29, 2026.
ADDRESSES: You may send comments, using the procedures found in 14 CFR
11.43 and 11.45, by any of the following methods:
<bullet> Federal eRulemaking Portal: Go to <a href="http://regulations.gov">regulations.gov</a>. Follow
the instructions for submitting comments.
<bullet> Fax: (202) 493-2251.
<bullet> 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.
<bullet> 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 <a href="http://regulations.gov">regulations.gov</a> under
Docket No. FAA-2026-4633; 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.
Material Incorporated by Reference:
<bullet> For Diamond Aircraft Industries material identified in
this proposed AD, contact DAI, 1560 Crumlin Sideroad, London, Ontario,
Canada, N5V 1S2; phone: (519) 457-4041; email: <a href="/cdn-cgi/l/email-protection#f3808683839c8187de90929d929792b3cf92d39b819695ce" http: diamondaircraft.com">diamondaircraft.com</a>">support-canada@<a href="http://diamondaircraft.com">diamondaircraft.com</a></a>; website: <a href="http://diamondaircraft.com">diamondaircraft.com</a>.
<bullet> You may view this material 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.
FOR FURTHER INFORMATION CONTACT: Fatin Saumik, Aviation Safety
Engineer, FAA, 1600 Stewart Avenue, Suite 410, Westbury, NY 11590;
phone: (516) 228-7300; email: <a href="/cdn-cgi/l/email-protection#056364716c6b2b772b766470686c6e456364642b626a73"><span class="__cf_email__" data-cfemail="c8aea9bca1a6e6bae6bba9bda5a1a388aea9a9e6afa7be">[email protected]</span></a>.
SUPPLEMENTARY INFORMATION:
Comments Invited
The FAA invites you to send any written relevant data, views, or
arguments about this proposal. Send your comments using a method listed
under ADDRESSES. Include ``Docket No. FAA-2026-4633; Project Identifier
MCAI-2025-01173-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
this 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
<a href="http://regulations.gov">regulations.gov</a>, 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 Fatin
Saumik, 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.
[[Page 26953]]
Background
Transport Canada, which is the aviation authority for Canada, has
issued Transport Canada AD CF-2025-30, dated June 23, 2025 (Transport
Canada AD CF-2025-30) (also referred to as the MCAI), to correct an
unsafe condition on all DAI Model DA 40, DA 40 D, DA 40 F, and DA 40 NG
airplanes. The MCAI states that DAI received several reports of
passenger door separation. DAI attributed the root cause of certain
instances to the passenger door not being properly latched and
subsequent attempts to latch the passenger door in flight. DAI was
unable to find a definitive root cause of the remaining occurrences.
Passenger door separation, if not addressed, could result in damage to
the airplane structure and lead to loss of control of the airplane and
injury to persons on the ground. The MCAI requires updating the AFM,
modifying the airplane in the passenger door latching mechanism and
safety hook mechanism areas, repetitively inspecting the door latching
and safety hook mechanisms, and reporting all findings to DAI.
You may examine the MCAI in the AD docket at <a href="http://regulations.gov">regulations.gov</a> under
Docket No. FAA-2026-4633.
Material Incorporated by Reference Under 1 CFR Part 51
The FAA reviewed Diamond Aircraft Mandatory Service Bulletin MSB
40-103/MSB F4-042/MSB D4-114/MSB 40NG-084 REV. 2, dated June 5, 2025
(issued as one document), published with Diamond Aircraft Work
Instruction WI-MSB 40-103/WI-MSB F4-042/WI-MSB D4-114/WI-MSB 40NG-084
REV. 2, dated June 5, 2025 (issued as one document). This material
specifies procedures for inspecting the passenger door latching
mechanism and safety hook mechanism areas and performing corrective
action, as applicable; inspecting the safety hook, latching bolts,
front and rear door guide blocks, canopy and passenger door warning
light, carbon hinges, tension spring, retaining block, safety hook push
button, latching mechanism spring, gas spring, and door frame;
measuring the passenger door handle actuation force; modifying the
airplane with placards; replacing the gas spring; and replacing the
hook assembly, retaining block, door guide blocks, and door sealant if
necessary for Model DA 40, DA 40 F, and DA 40 NG airplanes.
The FAA also reviewed Diamond Aircraft DA 40 AFM Doc. No. 6.01.01-E
Temporary Revision TR-MAM-40-1203, Door Latching and Locking, dated
December 16, 2024; Diamond Aircraft DA 40 F AFM Doc. No. 6.01.02-E
Temporary Revision TR-MAM-40-1203, Door Latching and Locking, dated
December 16, 2024; and Diamond Aircraft DA 40 NG AFM Doc. No. 6.01.15-E
Temporary Revision TR-MAM-40-1203/a, Door Latching and Locking, dated
February 18, 2025. This material specifies procedures for amending the
AFM by revising the operating limitations, emergency procedures, and
normal operating procedures related to door latching and locking for
Model DA 40, DA 40 F, and DA 40 NG airplanes.
This material 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
These products have been approved by the civil 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, that authority has notified the FAA of the unsafe condition
described in the MCAI and material referenced 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 require accomplishing the actions specified
in the material already described, except as discussed under
``Differences Between this Proposed AD and the MCAI.'' The owner/
operator (pilot) holding at least a private pilot certificate may
revise the existing AFM for the airplane and must enter compliance with
the applicable paragraph of this proposed AD into the airplane
maintenance records in accordance with 14 CFR 43.9(a) and
91.417(a)(2)(v). The pilot may perform this action because it only
involves revising the existing AFM. This action could be performed
equally well by a pilot or mechanic. This is an exception to the FAA's
standard maintenance regulations.
Differences Between This Proposed AD, the MCAI, and the Referenced
Material
The MCAI applies to DAI Model DA 40 D airplanes, but this proposed
AD would not include this model because it does not have an FAA type
certificate.
The service bulletin referred to in the MCAI specifies to contact
DAI for repair instructions, but this proposed AD would require
contacting the Manager, International Validation Branch, FAA; Transport
Canada; or DAI's Transport Canada Design Organization Approval (DOA)
instead.
The material referenced above specifies recording any findings in
the execution report and submitting the execution report to DAI, but
this proposed AD does not include that requirement.
Interim Action
The FAA considers that this proposed AD would be an interim action.
This unsafe condition is still under investigation by the manufacturer
and, depending on the results of that investigation, the FAA may
consider further rulemaking action.
Costs of Compliance
The FAA estimates that this AD, if adopted as proposed, would
affect 987 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
----------------------------------------------------------------------------------------------------------------
AFM revision..................... 1 work-hour x $85 $0 $85................ $83,895.
per hour = $85.
Initial inspection............... 3 work-hours x $85 76 $331............... $326,697.
per hour = $255.
Repetitive inspections........... 1 work-hour x $85 0 $85 per inspection. $83,895 per
per hour = $85 per inspection.
inspection.
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[[Page 26954]]
The FAA estimates the following costs to do any replacements that
would be required based on the results of the proposed inspection. The
agency has no way of determining the number of airplanes that might
need these replacements:
On-Condition Costs
----------------------------------------------------------------------------------------------------------------
Cost per
Action Labor cost Parts cost product
----------------------------------------------------------------------------------------------------------------
Gas spring replacement........................ 2 work-hours x $85 per hour = $489 $659
$170.
Hook assembly replacement..................... 4 work-hours x $85 per hour = 484 824
$340.
Retaining block replacement................... 1 work-hour x $85 per hour = $85 166 251
Door guide block replacement.................. 1 work-hour x $85 per hour = $85 206 291
Door sealant replacement...................... 1 work-hour x $85 per hour = $85 15 100
----------------------------------------------------------------------------------------------------------------
The FAA has included all known costs in its cost estimate.
According to the manufacturer, however, some of the costs of this
proposed AD may be covered under warranty, thereby reducing the cost
impact on affected operators.
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:
Diamond Aircraft Industries Inc.: Docket No. FAA-2026-4633; Project
Identifier MCAI-2025-01173-A.
(a) Comments Due Date
The FAA must receive comments on this airworthiness directive
(AD) by June 29, 2026.
(b) Affected ADs
None.
(c) Applicability
This AD applies to all Diamond Aircraft Industries Inc. (DAI)
Model DA 40, DA 40 F, and DA 40 NG airplanes, certificated in any
category.
(d) Subject
Joint Aircraft System Component (JASC) Code 5210, Passenger/Crew
Doors.
(e) Unsafe Condition
This AD was prompted by several reports of passenger door
separation during flight. The FAA is issuing this AD to address this
unsafe condition. The unsafe condition, if not addressed, could
result in damage to the airplane structure and lead to loss of
control of the airplane and injury to persons on the ground.
(f) Definition
For the purposes of this AD, the Diamond Aircraft work
instruction is defined as Diamond Aircraft Work Instruction WI-MSB
40-103/WI-MSB F4-042/WI-MSB D4-114/WI-MSB 40NG-084 REV. 2, dated
June 5, 2025 (issued as one document), published with Diamond
Aircraft Mandatory Service Bulletin MSB 40-103/MSB F4-042/MSB D4-
114/MSB 40NG-084 REV. 2, dated June 5, 2025 (issued as one
document).
(g) Applicable Airplane Flight Manual (AFM) Temporary Revisions
The following presents the AFM and temporary revisions that
apply to this AD and each individual model.
(1) For Model DA 40 airplanes: Diamond Aircraft DA 40 AFM Doc.
No. 6.01.01-E Temporary Revision TR-MAM-40-1203, Door Latching and
Locking, dated December 16, 2024.
(2) For Model DA 40 F airplanes: Diamond Aircraft DA 40 F AFM
Doc. No. 6.01.02-E Temporary Revision TR-MAM-40-1203, Door Latching
and Locking, dated December 16, 2024.
(3) For Model DA 40 NG airplanes: Diamond Aircraft DA 40 NG AFM
Doc. No. 6.01.15-E Temporary Revision TR-MAM-40-1203/a, Door
Latching and Locking, dated February 18, 2025.
(h) Compliance
Comply with this AD within the compliance times specified,
unless already done.
(i) Required Actions
(1) Within 100 hours time-in-service (TIS) or 100 days,
whichever occurs first after the effective date of this AD, revise
the existing AFM for the airplane to include the information
specified in the applicable AFM temporary revision specified in
paragraphs (g)(1) through (3) of this AD.
(i) The owner/operator (pilot) holding at least a private pilot
certificate may revise the existing AFM for the airplane and must
enter compliance with the applicable paragraph of this AD into the
airplane maintenance records in accordance with 14 CFR 43.9(a) and
91.417(a)(2)(v). The record must be maintained as required by 14 CFR
91.417, 121.380, or 135.439.
(ii) The AFM revision required by paragraph (i)(1) of this AD
may be accomplished before the initial inspection and modification
required by paragraph (i)(2) or (3) of this AD for that airplane.
[[Page 26955]]
(2) For airplanes with less than 100 total hours TIS as of the
effective date of this AD: Within 100 hours TIS or 100 days,
whichever occurs first after the effective date of this AD,
accomplish the initial inspection of the safety hook, latching
bolts, front and rear door guide blocks and the modification of the
airplane with placards in accordance with the instructions of
Section III, steps 5, 20 through 23, 28, 30, 31, and 33 through 36
in the Diamond Aircraft Work Instruction specified in paragraph (f)
of this AD, except accomplish the actions required by step 20(f) in
accordance with paragraphs (i)(4) and (5) of this AD.
(3) For airplanes that have accumulated 100 or more total hours
TIS as of the effective date of this AD: Within 100 hours TIS or 100
days, whichever occurs first after the effective date of this AD,
accomplish the initial inspection of the canopy and passenger door
warning light, carbon hinges, safety hook, tension spring, retaining
block, safety hook push button, safety hook mechanism, latching
mechanism spring, gas spring, latching bolts, front and rear door
guide blocks, and door frame; measure the passenger door handle
actuation force; and accomplish the modification of the airplane
with placards in accordance with the instructions of Section III,
steps 2 through 10, 12, 13, 15, 17, 18, 20 through 24, and 28
through 36 in the Diamond Aircraft Work Instruction specified in
paragraph (f) of this AD, except accomplish the actions required by
step 20(f) in accordance with paragraphs (i)(4) and (5) of this AD.
(4) If, during the inspection required by step 20(f) in the
Diamond Aircraft Work Instruction specified in paragraph (f) of this
AD, the force measured is less than 1.8 kg (18 N), and if the force
measured during the inspection required by step 20(c) was between 2
kg (20 N) and 6 kg (60 N), perform the following:
(i) Repeat the inspection required by step 20(c) in the Diamond
Aircraft Work Instruction specified in paragraph (f) of this AD
every 100 hours TIS until the replacement of the gas spring required
by paragraph (i)(4)(ii) of this AD is accomplished.
(ii) Within 12 months after the effective date of this AD,
replace the gas spring in accordance with the Diamond Aircraft Work
Instruction specified in paragraph (f) of this AD.
(5) If, during the inspection specified in step 20(f) in the
Diamond Aircraft Work Instruction specified in paragraph (f) of this
AD, the force measured is less than 1.8 kg (18 N), and if the force
measured during the inspection required by step 20(c) was greater
than 6 kg (60 N) or less than 2 kg (20 N), before further flight,
replace the gas spring.
(6) If, during any inspection as required by paragraph (i)(2) or
(3) of this AD, any findings, as defined in Section III, steps 5, 6,
9, 12, 20, and 23 are identified, before further flight, accomplish
the applicable corrective action(s) in accordance with the
instructions of Section IV, IV.1, steps 1 through 9, IV.2, steps 1
and 2, IV.3, steps 1 and 2, and IV.4, steps 1 through 5 in the
Diamond Aircraft Work Instruction specified in paragraph (f) of this
AD.
(7) Where the instructions of Section III or Section IV of the
Diamond Aircraft Work Instruction specified in paragraph (f) of this
AD state to contact the manufacturer ``in case of doubt'' or for
approved instructions, this AD requires before further flight, using
instructions approved by the Manager, International Validation
Branch, FAA; Transport Canada; or DAI's Transport Canada Design
Organization Approval (DOA), and within the compliance time
specified therein, accomplishing those instructions. If approved by
the DOA, the approval must include the DOA-authorized signature.
(j) No Reporting Requirement
Although the material referenced in paragraph (f) of this AD
specifies to submit information to the manufacturer, this AD does
not require that action.
(k) Credit for Previous Actions
You may take credit for the actions required by paragraph (i) of
this AD if you performed those actions before the effective date of
this AD using Diamond Aircraft Mandatory Service Bulletin MSB 40-
103/MSB F4-042/MSB D4-114/MSB 40NG-084 REV. 1, dated May 15, 2025
(issued as one document), published with Diamond Aircraft Work
Instruction WI-MSB 40-103/WI-MSB F4-042/WI-MSB D4-114/WI-MSB 40NG-
084 REV. 1, dated May 15, 2025 (issued as one document); or Diamond
Aircraft Mandatory Service Bulletin MSB 40-103/MSB F4-042/MSB D4-
114/MSB 40NG-084 REV. 0, dated March 20, 2025 (issued as one
document), published with Diamond Aircraft Work Instruction WI-MSB
40-103/WI-MSB F4-042/WI-MSB D4-114/WI-MSB 40NG-084 REV. 0, dated
March 20, 2025 (issued as one document).
(l) 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 manager of the International Validation Branch, send
it to the attention of the person identified in paragraph (m) of
this AD and email to: <a href="/cdn-cgi/l/email-protection#0445494b47446265652a636b72"><span class="__cf_email__" data-cfemail="2d6c60626e6d4b4c4c034a425b">[email protected]</span></a>. 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.
(m) Additional Information
For more information about this AD, contact Fatin Saumik,
Aviation Safety Engineer, FAA, 1600 Stewart Avenue, Suite 410,
Westbury, NY 11590; phone: (516) 228-7300; email:
<a href="/cdn-cgi/l/email-protection#dcbabda8b5b2f2aef2afbda9b1b5b79cbabdbdf2bbb3aa"><span class="__cf_email__" data-cfemail="0d6b6c796463237f237e6c786064664d6b6c6c236a627b">[email protected]</span></a>.
(n) Material Incorporated by Reference
(1) The Director of the Federal Register approved the
incorporation by reference of the material listed in this paragraph
under 5 U.S.C. 552(a) and 1 CFR part 51.
(2) You must use this material as applicable to do the actions
required by this AD, unless the AD specifies otherwise.
(i) Diamond Aircraft Mandatory Service Bulletin MSB 40-103/MSB
F4-042/MSB D4-114/MSB 40NG-084 REV. 2, dated June 5, 2025 (issued as
one document), published with Diamond Aircraft Work Instruction WI-
MSB 40-103/WI-MSB F4-042/WI-MSB D4-114/WI-MSB 40NG-084 REV. 2, dated
June 5, 2025 (issued as one document).
(ii) Diamond Aircraft DA 40 Airplane Flight Manual (AFM) Doc.
No. 6.01.01-E Temporary Revision TR-MAM-40-1203, Door Latching and
Locking, dated December 16, 2024.
(iii) Diamond Aircraft DA 40 F AFM Doc. No. 6.01.02-E Temporary
Revision TR-MAM-40-1203, Door Latching and Locking, dated December
16, 2024.
(iv) Diamond Aircraft DA 40 NG AFM Doc. No. 6.01.15-E Temporary
Revision TR-MAM-40-1203/a, Door Latching and Locking, dated February
18, 2025.
(3) For Diamond Aircraft Industries material identified in this
AD, contact Diamond Aircraft Industries Inc., 1560 Crumlin Sideroad,
London, Ontario, Canada, N5V 1S2; phone: (519) 457-4041; email:
<a href="/cdn-cgi/l/email-protection#44373134342b36306927252a252025047825642c36212279" http: diamondaircraft.com">diamondaircraft.com</a>">support-canada@<a href="http://diamondaircraft.com">diamondaircraft.com</a></a>; website: <a href="http://diamondaircraft.com">diamondaircraft.com</a>.
(4) You may view this material 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.
(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 <a href="http://www.archives.gov/federal-register/cfr/ibr-locations">www.archives.gov/federal-register/cfr/ibr-locations</a> or email <a href="/cdn-cgi/l/email-protection#e08692ce898e9390858394898f8ea08e819281ce878f96"><span class="__cf_email__" data-cfemail="b6d0c498dfd8c5c6d3d5c2dfd9d8f6d8d7c4d798d1d9c0">[email protected]</span></a>.
Issued on May 6, 2026.
Steven W. Thompson,
Acting Deputy Director, Compliance & Airworthiness Division, Aircraft
Certification Service.
[FR Doc. 2026-09574 Filed 5-12-26; 8:45 am]
BILLING CODE 4910-13-P
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