Rule2026-18600
Airworthiness Directives; Gulfstream Aerospace LP (Type Certificate Previously Held by Israel Aircraft Industries, Ltd.) 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
September 11, 2026
Effective
October 16, 2026
Issuing agencies
Transportation DepartmentFederal Aviation Administration
Abstract
The FAA is superseding Airworthiness Directive (AD) 2025-15- 04, which applied to all Gulfstream Aerospace LP Model G150 airplanes. AD 2025-15-04 required revising the existing maintenance or inspection program, as applicable, to incorporate a new airworthiness limitation. Since the FAA issued AD 2025-15-04, the FAA has determined that new or more restrictive airworthiness limitations are necessary. This AD continues to require actions in AD 2025-15-04 and requires revising the existing maintenance or inspection program, as applicable, to incorporate new or more restrictive airworthiness limitations. The FAA is issuing this AD to address the unsafe condition on these products.
Full Text
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<title>Federal Register, Volume 91 Issue 175 (Friday, September 11, 2026)</title>
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[Federal Register Volume 91, Number 175 (Friday, September 11, 2026)]
[Rules and Regulations]
[Pages 57775-57777]
From the Federal Register Online via the Government Publishing Office [<a href="http://www.gpo.gov">www.gpo.gov</a>]
[FR Doc No: 2026-18600]
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Rules and Regulations
Federal Register
________________________________________________________________________
This section of the FEDERAL REGISTER contains regulatory documents
having general applicability and legal effect, most of which are keyed
to and codified in the Code of Federal Regulations, which is published
under 50 titles pursuant to 44 U.S.C. 1510.
The Code of Federal Regulations is sold by the Superintendent of Documents.
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Federal Register / Vol. 91, No. 175 / Friday, September 11, 2026 /
Rules and Regulations
[[Page 57775]]
DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 39
[Docket No. FAA-2026-4654; Project Identifier MCAI-2026-00346-T;
Amendment 39-23461; AD 2026-18-06]
RIN 2120-AA64
Airworthiness Directives; Gulfstream Aerospace LP (Type
Certificate Previously Held by Israel Aircraft Industries, Ltd.)
Airplanes
AGENCY: Federal Aviation Administration (FAA), DOT.
ACTION: Final rule.
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SUMMARY: The FAA is superseding Airworthiness Directive (AD) 2025-15-
04, which applied to all Gulfstream Aerospace LP Model G150 airplanes.
AD 2025-15-04 required revising the existing maintenance or inspection
program, as applicable, to incorporate a new airworthiness limitation.
Since the FAA issued AD 2025-15-04, the FAA has determined that new or
more restrictive airworthiness limitations are necessary. This AD
continues to require actions in AD 2025-15-04 and requires revising the
existing maintenance or inspection program, as applicable, to
incorporate new or more restrictive airworthiness limitations. The FAA
is issuing this AD to address the unsafe condition on these products.
DATES: This AD is effective October 16, 2026.
The Director of the Federal Register approved the incorporation by
reference of a certain publication listed in this AD as of October 16,
2026.
The Director of the Federal Register approved the incorporation by
reference of a certain other publication listed in this AD as of
September 10, 2025 (90 FR 37786, August 6, 2025).
ADDRESSES:
AD Docket: You may examine the AD docket at <a href="http://regulations.gov">regulations.gov</a> under
Docket No. FAA-2026-4654; 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 final rule, the mandatory continuing airworthiness
information (MCAI), any comments received, and other information. The
address for Docket Operations is U.S. Department of Transportation,
Docket Operations, M-30, West Building Ground Floor, Room W12-140, 1200
New Jersey Avenue SE, Washington, DC 20590.
Material Incorporated by Reference:
<bullet> For Civil Aviation Authority of Israel (CAAI) material
identified in this AD, contact CAAI, P.O. Box 1101, Golan Street,
Airport City, 70100, Israel; telephone 972-3-9774665; fax 972-3-
9774592; email <a href="/cdn-cgi/l/email-protection#8eefe7fecee3e1faa0e9e1f8a0e7e2"><span class="__cf_email__" data-cfemail="4c2d253c0c212338622b233a622520">[email protected]</span></a>. You may find this material on the CAAI
website at <a href="http://www.gov">www.gov</a>.il/en/pages/israeli-airworthiness-directives.
<bullet> You may view this material at the FAA, Airworthiness
Products Section, Operational Safety Branch, 2200 South 216th St., Des
Moines, WA. For information on the availability of this material at the
FAA, call 206-231-3195. It is also available at <a href="http://regulations.gov">regulations.gov</a> under
Docket No. FAA-2026-4654.
FOR FURTHER INFORMATION CONTACT: Frank Huynh, Aviation Safety Engineer,
FAA, 1600 Stewart Avenue, Suite 410, Westbury, NY 11590; phone: 404-
983-5288; email: <a href="/cdn-cgi/l/email-protection#fb9d899a9590d5938e829593bb9d9a9ad59c948d"><span class="__cf_email__" data-cfemail="cfa9bdaea1a4e1a7bab6a1a78fa9aeaee1a8a0b9">[email protected]</span></a>.
SUPPLEMENTARY INFORMATION:
Background
The FAA issued a notice of proposed rulemaking (NPRM) to amend 14
CFR part 39 to supersede AD 2025-15-04, Amendment 39-23091 (90 FR
37786, August 6, 2025) (AD 2025-15-04). AD 2025-15-04 applied to all
Gulfstream Aerospace LP Model G150 airplanes. AD 2025-15-04 required
revising the existing maintenance or inspection program, as applicable,
to incorporate a new airworthiness limitation. The FAA issued AD 2025-
15-04 to address failure of the nose landing gear (NLG) actuator-to-
strut attachment pin. The unsafe condition, if not addressed, could
result in failure of the NLG to retract and lock after take-off or
extend and lock before landing.
The NPRM was published in the Federal Register on June 9, 2026 (91
FR 34788). The NPRM was prompted by CAAI AD ISR I-05-2025-10-1, dated
October 15, 2025 (CAAI AD ISR I-05-2025-10-1) (also referred to as the
MCAI), issued by CAAI, which is the aviation authority for Israel. The
MCAI states that new or more restrictive airworthiness limitations have
been developed as specified in Gulfstream 150 Maintenance Manual,
Section 05-10-10, Revision 30, dated September 15, 2025, which includes
an inspection reporting procedure.
In the NPRM, the FAA proposed to continue to require the actions in
AD 2025-15-04 and require revising the existing maintenance or
inspection program, as applicable, to incorporate new or more
restrictive airworthiness limitations, as specified in CAAI AD ISR I-
05-2025-10-1.
The FAA is issuing this AD to address fatigue damage in principal
structural elements of the horizontal stabilizer and elevator systems.
The unsafe condition, if not addressed, could result in undetected
fatigue cracking in critical empennage structural components, loss of
elevator control authority, and reduced structural integrity of the
airplane.
You may examine the MCAI in the AD docket at <a href="http://regulations.gov">regulations.gov</a> under
Docket No. FAA-2026-4654.
Discussion of Final Airworthiness Directive
Comments
The FAA received a comment from one individual who supported the
NPRM without change.
Conclusion
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 referenced above. The FAA reviewed the relevant
data, considered any comments received, and determined that air safety
requires adopting this AD as proposed. Accordingly, the FAA is issuing
this AD to address the unsafe condition on these products. Except for
minor editorial changes, this AD is adopted as proposed in the NPRM.
None of the changes will increase the economic burden on any operator.
[[Page 57776]]
Material Incorporated by Reference Under 1 CFR Part 51
CAAI AD ISR I-05-2025-10-1 specifies new or more restrictive
airworthiness limitations for airplane structures and safe life limits,
which include an inspection reporting procedure.
This AD also requires CAAI AD ISR I-32-24-10-01R1, which the
Director of the Federal Register approved for incorporation by
reference as of September 10, 2025 (90 FR 37786, August 6, 2025).
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.
Costs of Compliance
The FAA estimates that this AD affects 82 airplanes of U.S.
registry. The FAA estimates the following costs to comply with this AD:
The FAA estimates the total cost per operator for the retained actions
from AD 2025-15-04 to be $7,650 (90 work-hours x $85 per work-hour).
The FAA has determined that revising the existing maintenance or
inspection program takes an average of 90 work-hours per operator,
although the agency recognizes that this number may vary from operator
to operator. Since operators incorporate maintenance or inspection
program changes for their affected fleet(s), the FAA has determined
that a per-operator estimate is more accurate than a per-airplane
estimate.
The FAA estimates the total cost per operator for the new actions
to be $7,650 (90 work-hours x $85 per work-hour).
Paperwork Reduction Act
A federal agency may not conduct or sponsor, and a person is not
required to respond to, nor shall a person be subject to a penalty for
failure to comply with a collection of information subject to the
requirements of the Paperwork Reduction Act unless that collection of
information displays a currently valid OMB Control Number. The OMB
Control Number for this information collection is 2120-0056. Public
reporting for this collection of information is estimated to take
approximately 1 hour per response, including the time for reviewing
instructions, searching existing data sources, gathering and
maintaining the data needed, and completing and reviewing the
collection of information. All responses to this collection of
information are mandatory. Send comments regarding this burden estimate
or any other aspect of this collection of information, including
suggestions for reducing this burden, to: Information Collection
Clearance Officer, Federal Aviation Administration, 10101 Hillwood
Parkway, Fort Worth, TX 76177-1524.
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
This AD will not have federalism implications under Executive Order
13132. This AD will 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 this AD:
(1) Is not a ``significant regulatory action'' under Executive
Order 12866,
(2) Will not affect intrastate aviation in Alaska, and
(3) Will not have a significant economic impact, positive or
negative, on a substantial number of small entities under the criteria
of the Regulatory Flexibility Act.
List of Subjects in 14 CFR Part 39
Air transportation, Aircraft, Aviation safety, Incorporation by
reference, Safety.
The Amendment
Accordingly, under the authority delegated to me by the
Administrator, the FAA amends 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 (AD) 2025-15-04, Amendment 39-23091
(90 FR 37786, August 6, 2025); and
0
b. Adding the following new AD:
2026-18-06 Gulfstream Aerospace LP (Type Certificate Previously Held
by Israel Aircraft Industries, Ltd.): Amendment 39-23461; Docket No.
FAA-2026-4654; Project Identifier MCAI-2026-00346-T.
(a) Effective Date
This airworthiness directive (AD) is effective October 16, 2026.
(b) Affected ADs
This AD replaces AD 2025-15-04, Amendment 39-23091 (90 FR 37786,
August 6, 2025) (AD 2025-15-04).
(c) Applicability
This AD applies to all Gulfstream Aerospace (Type Certificate
previously held by Israel Aircraft Industries, Ltd.) LP Model
Gulfstream G150 airplanes, 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 a determination that new or more
restrictive airworthiness limitations are necessary. The FAA is
issuing this AD to address fatigue damage in principal structural
elements of the horizontal stabilizer and elevator systems, and to
prevent failure of the nose landing gear (NLG) actuator to strut
attachment pin. The unsafe condition, if not addressed, could result
in undetected fatigue cracking in critical empennage structural
components, loss of elevator control authority, and reduced
structural integrity of the airplane, or the failure of the NLG to
properly retract and lock after takeoff or extend and lock before
landing.
(f) Compliance
Comply with this AD within the compliance times specified,
unless already done.
(g) Retained Revision of the Existing Maintenance or Inspection
Program, With a New Terminating Action
This paragraph restates the requirements of paragraph (g) of AD
2025-15-04, with a new terminating action. Except as specified in
paragraph (h) of this AD: Comply with all required actions and
compliance times specified in, and in accordance with, Civil
Aviation Authority of Israel (CAAI) AD ISR
[[Page 57777]]
I-32-24-10-01R1, revised October 15, 2024 (CAAI AD ISR I-32-24-10-
01R1). Accomplishing the revision of the existing maintenance or
inspection program required by paragraph (j) of this AD terminates
the requirements of this paragraph.
(h) Retained Exceptions to CAAI AD ISR I 32 24-10-01R1, With No Changes
This paragraph restates the exceptions specified in paragraph
(h) of AD 2025-15-04, with no changes.
(1) Where CAAI AD ISR I-32-24-10-01R1 refers to its effective
date, this AD requires using September 10, 2025 (the effective date
of AD 2025-15-04).
(2) The initial compliance time for doing the task specified in
the Action paragraph of CAAI AD ISR I-32-24-10-01R1 is at the
applicable ``discard'' interval as specified in the material
referenced in the Action paragraph of CAAI AD ISR I-32-24-10-01R1,
or within 3 months after September 10, 2025 (the effective date of
AD 2025-15-04), whichever occurs later.
(3) Where the Action paragraph of CAAI AD ISR I-32-24-10-01R1
specifies to ``incorporate AMM Revision 29'', this AD requires
replacing that text with ``revise the existing maintenance or
inspection program, as applicable, by incorporating the Nose Landing
Gear Actuator to Nose Landing Gear Strut Attachment Pin task
identified in AMM Revision 29''.
(i) Retained Provisions for Alternative Actions and Intervals, With a
New Exception
This paragraph restates the requirements of paragraph (i) of AD
2025-15-04, with a new exception. Except as required by paragraph
(j) of this AD, after the existing maintenance or inspection program
has been revised as required by paragraph (g) of this AD, no
alternative actions (e.g., inspections) or intervals are allowed
unless they are approved as specified in the provisions of paragraph
(m)(1) of this AD.
(j) New Requirements
Except as specified in paragraph (k) of this AD: Comply with all
required actions and compliance times specified in, and in
accordance with, CAAI AD ISR I-05-2025-10-1, October 15, 2025 (CAAI
AD ISR I-05-2025-10-1). Accomplishing the revision of the existing
maintenance or inspection program required by this paragraph
terminates the requirements of paragraph (g) of this AD.
(k) Exceptions to CAAI AD ISR I-05-2025-10-1
(1) Where CAAI AD ISR I-05-2025-10-1 refers to its effective
date, this AD requires using the effective date of this AD.
(2) Where the Action paragraph of CAAI AD ISR I-05-2025-10-1
specifies to ``incorporate AMM Revision 30'', this AD requires
replacing the text with ``revise the existing maintenance or
inspection program, as applicable, to incorporate the information
specified in Section 05-10-10 Airworthiness Limitations, Chapter 05
Time Limits/Maintenance Checks, Gulfstream G150 Maintenance Manual,
Revision 30, dated September 15, 2025''.
(3) The initial compliance time for doing the tasks specified in
the material referenced in the Action paragraph of CAAI AD ISR I-05-
2025-10-1 is at the applicable initial inspection interval, comply
within time, or discard interval specified in the material
referenced in the Action paragraph of CAAI AD ISR I-05-2025-10-1, or
within 90 days after the effective date of this AD, whichever occurs
later.
(l) New Provisions for Alternative Actions and Intervals
After the existing maintenance or inspection program has been
revised as required by paragraph (j) of this AD, no alternative
actions (e.g., inspections) and intervals are allowed unless they
are approved as specified in the provisions of the Action paragraph
of CAAI AD ISR I-05-2025-10-1.
(m) Additional AD Provisions
The following provisions also apply to this AD.
(1) 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 (n) of this AD and email to:
<a href="/cdn-cgi/l/email-protection#46070b09050620272768212930"><span class="__cf_email__" data-cfemail="6e2f23212d2e080f0f40090118">[email protected]</span></a>. Before using any approved AMOC, notify your
appropriate principal inspector, or lacking a principal inspector,
the manager of the responsible Flight Standards Office.
(2) Contacting the Manufacturer: For any requirement in this AD
to obtain instructions from a manufacturer, the instructions must be
accomplished using a method approved by the Manager, International
Validation Branch, FAA; or CAAI; or CAAI's authorized Designee. If
approved by the CAAI Designee, the approval must include the
Designee's authorized signature.
(n) Additional Information
For more information about this AD, contact Frank Huynh,
Aviation Safety Engineer, FAA, 1600 Stewart Avenue, Suite 410,
Westbury, NY 11590; phone: 404-983-5288; email: <a href="/cdn-cgi/l/email-protection#cea8bcafa0a5e0a6bbb7a0a68ea8afafe0a9a1b8"><span class="__cf_email__" data-cfemail="9ff9edfef1f4b1f7eae6f1f7dff9fefeb1f8f0e9">[email protected]</span></a>.
(o) Material Incorporated by Reference
(1) The Director of the Federal Register approved the
incorporation by reference (IBR) 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.
(3) The following material was approved for IBR on October 16,
2026.
(i) Civil Aviation Authority of Israel (CAAI) AD ISR I-05-2025-
10-1, dated October 15, 2025.
(ii) [Reserved]
(4) The following material was approved for IBR on September 10,
2025 (90 FR 37786, August 6, 2025).
(i) Civil Aviation Authority of Israel (CAAI) AD ISR I-32-24-10-
01R1, revised October 15, 2024.
(ii) [Reserved]
(5) For CAAI material identified in this AD, contact CAAI, P.O.
Box 1101, Golan Street, Airport City, 70100, Israel; telephone 972-
3-9774665; fax 972-3-9774592; email <a href="/cdn-cgi/l/email-protection#76171f06361b190258111900581f1a"><span class="__cf_email__" data-cfemail="70111900301d1f045e171f065e191c">[email protected]</span></a>. You may find
this material on the CAAI website at <a href="http://www.gov">www.gov</a>.il/en/pages/israeli-
airworthiness-directives.
(6) You may view this material at the FAA, Airworthiness
Products Section, Operational Safety Branch, 2200 South 216th St.,
Des Moines, WA. For information on the availability of this material
at the FAA, call 206-231-3195.
(7) 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#e58397cb8c8b96958086918c8a8ba58b849784cb828a93"><span class="__cf_email__" data-cfemail="0264702c6b6c71726761766b6d6c426c6370632c656d74">[email protected]</span></a>.
Issued on August 31, 2026.
Christopher R. Parker,
Acting Deputy Director, Compliance & Airworthiness Division, Aircraft
Certification Service.
[FR Doc. 2026-18600 Filed 9-10-26; 8:45 am]
BILLING CODE 4910-13-P
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