Proposed Rule2026-09036
Airworthiness Directives; Airbus Helicopters
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 7, 2026
Issuing agencies
Transportation DepartmentFederal Aviation Administration
Abstract
The FAA proposes to adopt a new airworthiness directive (AD) for all Airbus Helicopters Model EC 155B and EC155B1 helicopters. This proposed AD was prompted by a determination that new or more restrictive airworthiness limitations are necessary. This proposed AD would require revising the airworthiness limitations section (ALS) of the existing maintenance manual (MM) or instructions for continued airworthiness and the existing approved maintenance or inspection program, as applicable. 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 88 (Thursday, May 7, 2026)</title>
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[Federal Register Volume 91, Number 88 (Thursday, May 7, 2026)]
[Proposed Rules]
[Pages 24757-24760]
From the Federal Register Online via the Government Publishing Office [<a href="http://www.gpo.gov">www.gpo.gov</a>]
[FR Doc No: 2026-09036]
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DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 39
[Docket No. FAA-2026-3880; Project Identifier MCAI-2025-01428-R]
RIN 2120-AA64
Airworthiness Directives; Airbus Helicopters
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 Airbus Helicopters Model EC 155B and EC155B1 helicopters. This
proposed AD was prompted by a determination that new or more
restrictive airworthiness limitations are necessary. This proposed AD
would require revising the airworthiness limitations section (ALS) of
the existing maintenance manual (MM) or instructions for continued
airworthiness and the existing approved maintenance or inspection
program, as applicable. 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 22, 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-2026-3880; 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 European Union Aviation Safety Agency (EASA) material
identified in this proposed AD, contact EASA, Konrad-Adenauer-Ufer 3,
50668 Cologne, Germany; phone: +49 221 8999 000; email:
<a href="/cdn-cgi/l/email-protection#ca8b8eb98aafabb9abe4afbfb8a5baabe4afbf"><span class="__cf_email__" data-cfemail="0342477043666270622d6676716c73622d6676">[email protected]</span></a>; website: easa.europa.eu. You may find the EASA
material on the EASA website at ad.easa.europa.eu.
<bullet> You may view this material at the FAA, Airworthiness
Products Section, Operational Safety Branch, 10101 Hillwood Parkway,
Fort Worth, TX 76177. For information on the availability of this
material at the FAA, call (817) 222-5110.
FOR FURTHER INFORMATION CONTACT: Zakaria Abdi, Aviation Safety
Engineer, FAA, 1600 Stewart Avenue, Suite 410, Westbury, NY 11590;
phone: (316) 946-4141; email: <a href="/cdn-cgi/l/email-protection#4d372c262c3f242c632b632c2f29240d2b2c2c632a223b"><span class="__cf_email__" data-cfemail="4e342f252f3c272f6028602f2c2a270e282f2f60292138">[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-2026-3880; Project Identifier
MCAI-2025-01428-R'' 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
[[Page 24758]]
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
Zakaria Abdi, 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
EASA, which is the Technical Agent for the Member States of the
European Union, has issued EASA AD 2025-0191, dated September 4, 2025
(EASA AD 2025-0191) (also referred to as the MCAI), to correct an
unsafe condition on Airbus Helicopters Model EC 155 B and EC 155 B1
helicopters. The MCAI states that new or more restrictive airworthiness
limitations have been developed. Additionally, the MCAI states that the
airworthiness limitations are identified as mandatory for continued
airworthiness and that AH [Airbus Helicopters] has issued applicable
ALS revisions to specify instructions to determine the compliance time
for the replacement of the upper attach beam.
The FAA is issuing this proposed AD to prevent failure of certain
parts and primary structural components, which if not addressed, could
result in loss of control of the helicopter.
You may examine the MCAI in the AD docket at <a href="http://regulations.gov">regulations.gov</a> under
Docket No. FAA-2026-3880.
Material Incorporated by Reference Under 1 CFR Part 51
The FAA reviewed EASA AD 2025-0191, which specifies procedures for
replacing components before exceeding their life limits and
accomplishing all applicable maintenance tasks within thresholds and
intervals specified in the ALS as defined in EASA AD 2025-0191.
Additionally, EASA AD 2025-0191 specifies procedures for revising
the Aircraft Maintenance Programme (AMP) by incorporating the
limitations, tasks, and associated thresholds and intervals described
in the specified ALS, as applicable. Revising the AMP constitutes a
terminating action for the requirement to record accomplishment of the
actions of replacing components before exceeding their life limits and
accomplishing maintenance tasks within thresholds and intervals
specified in the applicable ALS as specified in EASA AD 2025-0191 for
demonstration of AD compliance on a continued basis.
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 ADDRESSES.
FAA's Determination
These products have been approved by the civil aviation authority
(CAA) 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 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 the actions specified in EASA AD
2025-0191, described previously, as incorporated by reference, except
for any differences identified as exceptions in the regulatory text of
this proposed AD. See ``Differences Between this Proposed AD and the
MCAI'' for a discussion of the general differences included in this AD.
Differences Between This Proposed AD and the MCAI
The MCAI requires revising the approved AMP within 12 months,
whereas this proposed AD would require revising the ALS of the existing
approved MM or inspection program, as applicable, within 30 days, and
clarifies that if an incorporated limitation or threshold therein is
reached before 30 days after the effective date of the final rule of
this proposed AD, you still have up to 30 days after the effective date
of the final rule of this proposed AD to accomplish the corresponding
task.
Explanation of Required Compliance Information
In the FAA's ongoing efforts to improve the efficiency of the AD
process, the FAA developed a process to use some civil aviation
authority (CAA) ADs as the primary source of information for compliance
with requirements for corresponding FAA ADs. The FAA has been
coordinating this process with manufacturers and CAAs. As a result, the
FAA proposes to incorporate EASA AD 2025-0191 by reference in the FAA
final rule. This proposed AD would, therefore, require compliance with
EASA AD 2025-0191 in its entirety through that incorporation, except
for any differences identified as exceptions in the regulatory text of
this proposed AD. Using common terms that are the same as the heading
of a particular section in EASA AD 2025-0191 does not mean that
operators need comply only with that section. For example, where the AD
requirement refers to ``all required actions and compliance times,''
compliance with this AD requirement is not limited to the section
titled ``Required Action(s) and Compliance Time(s)'' in EASA AD 2025-
0191. Material required by EASA AD 2025-0191 for compliance will be
available at <a href="http://regulations.gov">regulations.gov</a> under Docket No. FAA-2026-3880 after the
FAA final rule is published.
Costs of Compliance
The FAA estimates that this AD, if adopted as proposed, would
affect 16 helicopters of U.S. registry.
The FAA estimates the following costs to comply with this proposed
AD:
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Estimated Costs
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Cost per Cost on U.S.
Action Labor cost Parts cost product operators
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Revise the ALS and maintenance and 1 work-hour x $85 per $0 $85 $1,360
inspection program, as applicable. hour = $85.
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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:
Airbus Helicopters: Docket No. FAA-2026-3880; Project Identifier
MCAI-2025-01428-R.
(a) Comments Due Date
The FAA must receive comments on this airworthiness directive
(AD) by June 22, 2026.
(b) Affected ADs
None.
(c) Applicability
This AD applies to all Airbus Helicopters Model EC 155B and
EC155B1 helicopters, certificated in any category.
(d) Subject
Air Transport Association (ATA) of America Code 05, Time Limits/
Maintenance Checks.
(e) Unsafe Condition
This AD was prompted by new or more restrictive airworthiness
limitations. The FAA is issuing this AD to prevent failure of
certain parts and primary structural components, which if not
addressed, could result in loss of control of the helicopter.
(f) Compliance
Comply with this AD within the compliance times specified,
unless already done.
(g) Required Actions
Except as specified in paragraphs (h) and (i) of this AD, comply
with all required actions and compliance times specified in, and in
accordance with European Union Aviation Safety Agency AD 2025-0191,
dated September 4, 2025 (EASA AD 2025-0191).
(h) Exceptions to EASA AD 2025-0191
(1) Where EASA AD 2025-0191 refers to its effective date, this
AD requires using the effective date of this AD.
(2) This AD does not adopt paragraphs (1), (2), (4) and (5) of
EASA AD 2025-0191.
(3) Where paragraph (3) of EASA AD 2025-0191 specifies ``Within
12 months after the effective date of this AD, revise the approved
AMP'', this AD requires replacing that text with ``Within 30 days
after the effective date of this AD, revise the airworthiness
limitations section of the existing maintenance manual or
instructions for continued airworthiness and the existing approved
maintenance or inspection program, as applicable''.
(4) The initial compliance time for doing the tasks specified in
paragraph (3) of EASA AD 2025-0191 is on or before the applicable
``limitations'' and ``associated thresholds'' as incorporated by the
requirements of paragraph (3) of EASA AD 2025-0191 or within 30 days
after the effective date of this AD, whichever occurs later.
(5) This AD does not adopt the ``Remarks'' section of EASA AD
2025-0191.
(i) Provisions for Alternative Actions and Intervals
After revising the airworthiness limitations section of the
existing maintenance manual or instructions for continued
airworthiness and the existing approved maintenance or inspection
program as required by paragraph (g) of this AD, no alternative
actions (e.g., inspections) and associated thresholds and intervals,
including life limits, are allowed unless they are approved as
specified in the provisions of the Ref. Publications section of EASA
AD 2025-0191.
(j) Alternative Methods of Compliance (AMOCs)
(1) 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 (k) of
this AD and email to: <a href="/cdn-cgi/l/email-protection#f5b4b8bab6b5939494db929a83"><span class="__cf_email__" data-cfemail="c3828e8c8083a5a2a2eda4acb5">[email protected]</span></a>.
(2) 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.
(k) Additional Information
For more information about this AD, contact Zakaria Abdi,
Aviation Safety Engineer, FAA, 1600 Stewart Avenue, Suite 410,
Westbury, NY 11590; phone: (316) 946-4141; email:
<a href="/cdn-cgi/l/email-protection#8ff5eee4eefde6eea1e9a1eeedebe6cfe9eeeea1e8e0f9"><span class="__cf_email__" data-cfemail="304a515b514259511e561e51525459705651511e575f46">[email protected]</span></a>.
(l) 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.
[[Page 24760]]
(i) European Union Aviation Safety Agency (EASA) AD 2025-0191,
dated September 4, 2025.
(ii) [Reserved]
(3) For EASA material identified in this AD, contact EASA,
Konrad-Adenauer-Ufer 3, 50668 Cologne, Germany; phone: +49 221 8999
000; email: <a href="/cdn-cgi/l/email-protection#5011142310353123317e3525223f20317e3525"><span class="__cf_email__" data-cfemail="f6b7b285b693978597d8938384998697d89383">[email protected]</span></a>; website: easa.europa.eu. You may
find the EASA material on the EASA website at ad.easa.europa.eu.
(4) You may view this material at the FAA, Airworthiness
Products Section, Operational Safety Branch, 10101 Hillwood Parkway,
Fort Worth, TX 76177. 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#f49286da9d9a87849197809d9b9ab49a958695da939b82"><span class="__cf_email__" data-cfemail="fe988cd097908d8e9b9d8a979190be909f8c9fd0999188">[email protected]</span></a>.
Issued on May 4, 2026.
Steven W. Thompson,
Acting Deputy Director, Compliance & Airworthiness Division, Aircraft
Certification Service.
[FR Doc. 2026-09036 Filed 5-6-26; 8:45 am]
BILLING CODE 4910-13-P
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