Proposed Rule2026-10781
Airworthiness Directives; Rolls-Royce Deutschland Ltd & Co KG 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
May 29, 2026
Issuing agencies
Transportation DepartmentFederal Aviation Administration
Abstract
The FAA is withdrawing an NPRM that published on September 15, 2025, that would have applied to all Rolls-Royce Deutschland Ltd & Co KG (RRD) Model RB211 Trent 768-60, 772-60, and 772B-60 engines. The NPRM would have required removal from service of affected low-pressure compressor (LPC) blades and replacement with a serviceable part. Since the NPRM was issued, it was determined that additional LPC blades are affected by the unsafe condition and were not included in the service material, and the FAA is evaluating for further rulemaking action. Accordingly, during this evaluation, the NPRM is withdrawn.
Full Text
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<title>Federal Register, Volume 91 Issue 103 (Friday, May 29, 2026)</title>
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[Federal Register Volume 91, Number 103 (Friday, May 29, 2026)]
[Proposed Rules]
[Page 31992]
From the Federal Register Online via the Government Publishing Office [<a href="http://www.gpo.gov">www.gpo.gov</a>]
[FR Doc No: 2026-10781]
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DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 39
[Docket No. FAA-2025-2541; Product Identifier MCAI-2024-00390-E]
RIN 2120-AA64
Airworthiness Directives; Rolls-Royce Deutschland Ltd & Co KG
Engines
AGENCY: Federal Aviation Administration (FAA), DOT.
ACTION: Notice of proposed rulemaking (NPRM); withdrawal.
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SUMMARY: The FAA is withdrawing an NPRM that published on September 15,
2025, that would have applied to all Rolls-Royce Deutschland Ltd & Co
KG (RRD) Model RB211 Trent 768-60, 772-60, and 772B-60 engines. The
NPRM would have required removal from service of affected low-pressure
compressor (LPC) blades and replacement with a serviceable part. Since
the NPRM was issued, it was determined that additional LPC blades are
affected by the unsafe condition and were not included in the service
material, and the FAA is evaluating for further rulemaking action.
Accordingly, during this evaluation, the NPRM is withdrawn.
DATES: As of May 29, 2026, the proposed rule, which was published in
the Federal Register on September 15, 2025 (90 FR 44335), is withdrawn.
ADDRESSES: You may examine the AD docket at <a href="http://regulations.gov">regulations.gov</a> under
Docket No. FAA-2025-2541; or in person at the Docket Operations Office
between 9 a.m. and 5 p.m., Monday through Friday, except Federal
holidays. The AD docket contains this AD action (withdrawal), the NPRM,
the mandatory continuing airworthiness information, any comments
received, and other information. The street 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.
FOR FURTHER INFORMATION CONTACT: Barbara Caufield, Aviation Safety
Engineer, FAA, 2200 South 216th Street, Des Moines, WA 98198; phone:
(781) 238-7146; email: <a href="/cdn-cgi/l/email-protection#761417041417041758151703101f131a123610171758111900"><span class="__cf_email__" data-cfemail="ff9d9e8d9d9e8d9ed19c9e8a99969a939bbf999e9ed1989089">[email protected]</span></a>.
SUPPLEMENTARY INFORMATION:
Discussion
Background
The FAA issued an NPRM that proposed to amend 14 CFR part 39 by
adding an AD for all RRD Model RB211 Trent 768-60, 772-60, and 772B-60
engines. The NPRM was published in the Federal Register on September
15, 2025 (90 FR 44335). The NPRM was prompted by a report that a batch
of LPC blades are more prone to cracking due to a deviation from the
approved blade configuration design. The NPRM proposed to require
removal from service of the affected LPC blades and replacement with a
serviceable part, as specified in European Union Aviation Safety Agency
(EASA) AD 2024-0130, dated July 8, 2024 (EASA AD 2024-0130).
The proposed actions were intended to prevent blade cracking. The
unsafe condition, if not addressed, could lead to multiple structural
failures of the affected parts, which could result in increased risk of
in-flight shutdown, engine fire, and uncontained high-energy debris
release.
Actions Since the NPRM Was Issued
Since issuance of the NPRM, EASA superseded EASA AD 2024-0130 and
issued EASA AD 2025-0288, dated December 17, 2025 (EASA AD 2025-0288),
which expands the list of affected LPC blades by adding nine additional
serial numbers to the removal requirements. The FAA is evaluating this
issue for further rulemaking action, and during this evaluation, the
NPRM is being withdrawn because it required compliance with EASA AD
2024-0130, which has been determined not to include all affected LPC
blades.
Withdrawal of the NPRM constitutes only such action and does not
preclude the FAA from further rulemaking on this issue, nor does it
commit the FAA to any course of action in the future
FAA's Determination
Upon further consideration, the FAA has determined that the NPRM is
insufficient because it does not address all affected LPC blades.
Accordingly, the NPRM is withdrawn.
Regulatory Findings
Since this action only withdraws an NPRM, it is neither a proposed
nor a final rule and therefore is not covered under Executive Order
12866, the Regulatory Flexibility Act, or DOT Regulatory Policies and
Procedures (44 FR 11034, February 26, 1979).
List of Subjects in 14 CFR Part 39
Air transportation, Aircraft, Aviation safety, Incorporation by
reference, Safety.
The Withdrawal
Accordingly, the notice of proposed rulemaking (Docket No. FAA-
2025-2541), which was published in the Federal Register on September
15, 2025 (90 FR 44335), is withdrawn.
Issued on May 27, 2026.
Lona C. Saccomando,
Acting Deputy Director, Integrated Certificate Management Division,
Aircraft Certification Service.
[FR Doc. 2026-10781 Filed 5-28-26; 8:45 am]
BILLING CODE 4910-13-P
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