Proposed Rule2026-11085
Airworthiness Directives; General Electric Company Engines
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
June 3, 2026
Issuing agencies
Transportation DepartmentFederal Aviation Administration
Abstract
The FAA proposes to adopt a new airworthiness directive (AD) for certain General Electric Company (GE) Model GEnx-1B64, GEnx-1B64/ P1, GEnx-1B64/P2, GEnx-1B67, GEnx-1B67/P1, GEnx-1B67/P2, GEnx-1B70, GEnx-1B70/75/P1, GEnx-1B70/75/P2, GEnx-1B70/P1, GEnx-1B70/P2, GEnx- 1B70C/P1, GEnx-1B70C/P2, GEnx-1B74/75/P1, GEnx-1B74/75/P2, GEnx-1B76/ P2, Genx-1B76A/P2, GEnx-2B67, GEnx-2B67B, and GEnx-2B67/P engines. This proposed AD was prompted by a report of a fuel leak from a worn main fuel pump inlet housing. This proposed AD would require removal from service of the main fuel pump and replacement with a part eligible for installation. The FAA is proposing this AD to address the unsafe condition on these products.
Full Text
<html>
<head>
<title>Federal Register, Volume 91 Issue 106 (Wednesday, June 3, 2026)</title>
</head>
<body><pre>
[Federal Register Volume 91, Number 106 (Wednesday, June 3, 2026)]
[Proposed Rules]
[Pages 33127-33129]
From the Federal Register Online via the Government Publishing Office [<a href="http://www.gpo.gov">www.gpo.gov</a>]
[FR Doc No: 2026-11085]
========================================================================
Proposed Rules
Federal Register
________________________________________________________________________
This section of the FEDERAL REGISTER contains notices to the public of
the proposed issuance of rules and regulations. The purpose of these
notices is to give interested persons an opportunity to participate in
the rule making prior to the adoption of the final rules.
========================================================================
Federal Register / Vol. 91, No. 106 / Wednesday, June 3, 2026 /
Proposed Rules
[[Page 33127]]
DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 39
[Docket No. FAA-2026-4651; Project Identifier AD-2025-01669-E]
RIN 2120-AA64
Airworthiness Directives; General Electric Company Engines
AGENCY: Federal Aviation Administration (FAA), DOT.
ACTION: Notice of proposed rulemaking (NPRM).
-----------------------------------------------------------------------
SUMMARY: The FAA proposes to adopt a new airworthiness directive (AD)
for certain General Electric Company (GE) Model GEnx-1B64, GEnx-1B64/
P1, GEnx-1B64/P2, GEnx-1B67, GEnx-1B67/P1, GEnx-1B67/P2, GEnx-1B70,
GEnx-1B70/75/P1, GEnx-1B70/75/P2, GEnx-1B70/P1, GEnx-1B70/P2, GEnx-
1B70C/P1, GEnx-1B70C/P2, GEnx-1B74/75/P1, GEnx-1B74/75/P2, GEnx-1B76/
P2, Genx-1B76A/P2, GEnx-2B67, GEnx-2B67B, and GEnx-2B67/P engines. This
proposed AD was prompted by a report of a fuel leak from a worn main
fuel pump inlet housing. This proposed AD would require removal from
service of the main fuel pump and replacement with a part eligible for
installation. The FAA is proposing this AD to address the unsafe
condition on these products.
DATES: The FAA must receive comments on this proposed AD by July 20,
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-2026-4651; 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, any comments received, and other
information. The street address for Docket Operations is listed above.
FOR FURTHER INFORMATION CONTACT: Itanza Young, Aviation Safety
Engineer, FAA, 2200 South 216th Street, Des Moines, WA 98198; phone:
(206) 482-6306; email: <a href="/cdn-cgi/l/email-protection#a4cdd0c5cadec58aca8addcbd1cac3e4c2c5c58ac3cbd2"><span class="__cf_email__" data-cfemail="3d54495c53475c135313445248535a7d5b5c5c135a524b">[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 the ADDRESSES section. Include ``Docket No. FAA-2026-4651;
Project Identifier AD-2025-01669-E'' 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 revise 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
Itanza Young, Aviation Safety Engineer, FAA, 2200 South 216th Street,
Des Moines, WA 98198. 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 received a report that a Boeing 787-8 Model airplane
powered by GEnx-1B70/P2 engines experienced a fuel imbalance caused by
a fuel leak on the inlet housing of the main fuel pump. A manufacturer
investigation revealed that the inlet housing distress was related to
the failure of thrust bearing screws inside the housing, which was
caused by inadequate torque control practices during overhaul. This
condition, if not addressed, could result in an uncontrolled engine
fire and damage to the airplane.
FAA's Determination
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 removal from service of the main
fuel pump and replacement with a part eligible for installation.
Costs of Compliance
The FAA estimates that this AD, if adopted as proposed, would
affect 265 engines installed on airplanes of U.S. registry. Although
this AD provides two options for replacement of the main fuel pump with
a new or overhauled part for compliance, the FAA predicts most
operators will choose to replace with an overhauled part, which is the
most cost-effective option. If choosing to replace with a new part, the
cost of a new main fuel pump is estimated to be $607,255.
[[Page 33128]]
The FAA estimates the following costs to comply with this proposed
AD:
Estimated Costs
----------------------------------------------------------------------------------------------------------------
Cost per Cost on U.S.
Action Labor cost Parts cost product operators
----------------------------------------------------------------------------------------------------------------
Replace main fuel pump--overhauled 8 work-hours x $85 per $24,657 $25,337 $6,714,305
part. hour = $680.
----------------------------------------------------------------------------------------------------------------
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:
General Electric Company: Docket No. FAA-2026-4651; Project
Identifier AD-2025-01669-E.
(a) Comments Due Date
The FAA must receive comments on this airworthiness directive
(AD) by July 20, 2026.
(b) Affected ADs
None.
(c) Applicability
This AD applies to General Electric Company (GE) Model GEnx-
1B64, GEnx-1B64/P1, GEnx-1B64/P2, GEnx-1B67, GEnx-1B67/P1, GEnx-
1B67/P2, GEnx-1B70, GEnx-1B70/75/P1, GEnx-1B70/75/P2, GEnx-1B70/P1,
GEnx-1B70/P2, GEnx-1B70C/P1, GEnx-1B70C/P2, GEnx-1B74/75/P1, GEnx-
1B74/75/P2, GEnx-1B76/P2, Genx-1B76A/P2, GEnx-2B67, GEnx-2B67B, and
GEnx-2B67/P engines with a main fuel pump installed having a part
number (P/N) identified in table 1 to paragraph (c) of this AD.
Table 1 to Paragraph (c)--Affected Main Fuel Pumps
----------------------------------------------------------------------------------------------------------------
Eaton vendor
Part nomenclature GE P/N identification Woodward VIN
No. (VIN)
----------------------------------------------------------------------------------------------------------------
Main Fuel Pump................................................ 2122M22P03 846400-1 1330-1018
Main Fuel Pump................................................ 2122M22P04 846400-2 1330-1048
----------------------------------------------------------------------------------------------------------------
(d) Subject
Joint Aircraft System Component (JASC) Code 7314, Engine Fuel
Pump.
(e) Unsafe Condition
This AD was prompted by a report of a fuel leak from a worn main
fuel pump inlet housing. The FAA is issuing this AD to prevent wear
and subsequent fuel leak of certain main fuel pumps. The unsafe
condition, if not addressed, could result in an uncontrolled engine
fire and damage to the airplane.
(f) Compliance
Comply with this AD within the compliance times specified,
unless already done.
(g) Definitions
For the purpose of this AD:
(1) An ``engine shop visit'' is defined as the induction of an
engine or module into the shop for maintenance.
(2) A ``part eligible for installation'' is defined as the
following, as applicable:
(i) A main fuel pump that does not have a part number identified
in table 1 to paragraph (c) of this AD.
(ii) A main fuel pump that has a part number identified in table
1 to paragraph (c) of this AD that is a new part with no prior
service history.
(iii) A main fuel pump that has a part number identified in
table 1 to paragraph (c) of this AD that has been overhauled and
confirmed to have all thrust bearing screws replaced in accordance
with any revision of GE Service Bulletins GEnx-1B SB73-0117 or GEnx-
2B SB73-0110.
(iv) A main fuel pump that has a part number identified in table
1 to paragraph (c) of this AD that has been overhauled after January
1, 2023, and confirmed to have all thrust bearing screws replaced.
[[Page 33129]]
(h) Required Actions
At the next engine shop visit after the effective date of this
AD, remove from service any affected main fuel pump having a part
number identified in table 1 to paragraph (c) of this AD that does
not meet the definition of a part eligible for installation in
paragraph (g)(2) of this AD, and replace with a part eligible for
installation.
(i) Alternative Methods of Compliance (AMOCs)
(1) The Manager, AIR-520 Continued Operational Safety 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 AIR-520 Continued
Operational Safety Branch, send it to the attention of the person
identified in paragraph (j) of this AD and email to: <a href="/cdn-cgi/l/email-protection#fdbcb0b2bebd9b9c9cd39a928b"><span class="__cf_email__" data-cfemail="1f5e52505c5f797e7e31787069">[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.
(j) Additional Information
(1) For more information about this AD, contact Itanza Young,
Aviation Safety Engineer, FAA, 2200 South 216th Street, Des Moines,
WA 98198; phone: (206) 482-6306; email: <a href="/cdn-cgi/l/email-protection#bed7cadfd0c4df90d090c7d1cbd0d9fed8dfdf90d9d1c8"><span class="__cf_email__" data-cfemail="0b627f6a65716a25652572647e656c4b6d6a6a256c647d">[email protected]</span></a>.
(2) For material identified in this AD that is not incorporated
by reference, contact General Electric Company, 1 Neumann Way,
Cincinnati, OH 45215; phone: (513) 552-3272; email:
<a href="/cdn-cgi/l/email-protection#8eeff8e7effae7e1e0a0e8e2ebebfafdfbfefee1fcfacee9eba0ede1e3"><span class="__cf_email__" data-cfemail="0a6b7c636b7e636564246c666f6f7e797f7a7a65787e4a6d6f24696567">[email protected]</span></a>; website: <a href="http://geaviation.com/support">geaviation.com/support</a>.
(k) Material Incorporated by Reference
None.
Issued on May 29, 2026.
Brian Knaup,
Acting Deputy Director, Integrated Certificate Management Division,
Aircraft Certification Service.
[FR Doc. 2026-11085 Filed 6-2-26; 8:45 am]
BILLING CODE 4910-13-P
</pre><script data-cfasync="false" src="/cdn-cgi/scripts/5c5dd728/cloudflare-static/email-decode.min.js"></script></body>
</html>Indexed from Federal Register on June 3, 2026.
This is legal information, not legal advice. Laws vary by jurisdiction and change frequently. Always verify current law with official sources and consult a licensed attorney in your jurisdiction for advice on your specific situation.