Rule2025-03009
Airworthiness Directives; Rolls-Royce Deutschland Ltd & Co KG Engines
Primary source
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Published
February 25, 2025
Effective
April 1, 2025
Issuing agencies
Transportation DepartmentFederal Aviation Administration
Abstract
The FAA is adopting a new airworthiness directive (AD) for all Rolls-Royce Deutschland Ltd & Co KG Model Trent 1000-AE3, Trent 1000- CE3, Trent 1000-D3, Trent 1000-G3, Trent 1000-H3, Trent 1000-J3, Trent 1000-K3, Trent 1000-L3, Trent 1000-M3, Trent 1000-N3, Trent 1000-P3, Trent 1000-Q3, Trent 1000-R3, Trent 7000-72, and Trent 7000-72C engines. This AD was prompted by reports of cracked intermediate pressure compressor (IPC) shaft assembly front air seals. This AD requires an inspection of the affected IPC shaft assembly for cracking and, depending on the results of the inspection, repetitive inspections or replacement of the IPC shaft assembly front air seals, as specified in a European Union Aviation Safety Agency (EASA) AD, which is incorporated by reference. The FAA is issuing this AD to address the unsafe condition on these products.
Full Text
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<title>Federal Register, Volume 90 Issue 36 (Tuesday, February 25, 2025)</title>
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[Federal Register Volume 90, Number 36 (Tuesday, February 25, 2025)]
[Rules and Regulations]
[Pages 10590-10592]
From the Federal Register Online via the Government Publishing Office [<a href="http://www.gpo.gov">www.gpo.gov</a>]
[FR Doc No: 2025-03009]
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DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 39
[Docket No. FAA-2024-2414; Project Identifier MCAI-2024-00530-E;
Amendment 39-22947; AD 2025-02-14]
RIN 2120-AA64
Airworthiness Directives; Rolls-Royce Deutschland Ltd & Co KG
Engines
AGENCY: Federal Aviation Administration (FAA), DOT.
ACTION: Final rule.
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SUMMARY: The FAA is adopting a new airworthiness directive (AD) for all
Rolls-Royce Deutschland Ltd & Co KG Model Trent 1000-AE3, Trent 1000-
CE3, Trent 1000-D3, Trent 1000-G3, Trent 1000-H3, Trent 1000-J3, Trent
1000-K3, Trent 1000-L3, Trent 1000-M3, Trent 1000-N3, Trent 1000-P3,
Trent 1000-Q3, Trent 1000-R3, Trent 7000-72, and Trent 7000-72C
engines. This AD was prompted by reports of cracked intermediate
pressure compressor (IPC) shaft assembly front air seals. This AD
requires an inspection of the affected IPC shaft assembly for cracking
and, depending on the results of the inspection, repetitive inspections
or replacement of the IPC shaft assembly front air seals, as specified
in a European Union Aviation Safety Agency (EASA) AD, which is
incorporated by reference. The FAA is issuing this AD to address the
unsafe condition on these products.
DATES: This AD is effective April 1, 2025.
The Director of the Federal Register approved the incorporation by
reference of a certain publication listed in this AD as of April 1,
2025.
ADDRESSES:
AD Docket: You may examine the AD docket at <a href="http://regulations.gov">regulations.gov</a> under
Docket No. FAA-2024-2414; 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 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#c18085b281a4a0b2a0efa4b4b3aeb1a0efa4b4"><span class="__cf_email__" data-cfemail="c9888dba89aca8baa8e7acbcbba6b9a8e7acbc">[email protected]</span></a>; website: easa.europa.eu. You may find
this 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, 1200 District Avenue,
Burlington, MA 01803. For information on the availability of this
material at the FAA, call (817) 222-5110. It is also available at
<a href="http://regulations.gov">regulations.gov</a> under Docket No. FAA-2024-2414.
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#0f6d6e7d6d6e7d6e216c6e7a69666a636b4f696e6e21686079"><span class="__cf_email__" data-cfemail="93f1f2e1f1f2e1f2bdf0f2e6f5faf6fff7d3f5f2f2bdf4fce5">[email protected]</span></a>.
SUPPLEMENTARY INFORMATION:
Background
The FAA issued a notice of proposed rulemaking (NPRM) to amend 14
CFR part 39 by adding an AD that would apply to all Rolls-Royce
Deutschland Ltd & Co KG Model Trent 1000-AE3, Trent 1000-CE3, Trent
1000-D3, Trent 1000-G3, Trent 1000-H3, Trent 1000-J3, Trent 1000-K3,
Trent 1000-L3, Trent 1000-M3, Trent 1000-N3, Trent 1000-P3, Trent 1000-
Q3, Trent 1000-R3, Trent 7000-72, and Trent 7000-72C engines. The NPRM
published in the
[[Page 10591]]
Federal Register on October 29, 2024 (89 FR 85890). The NPRM was
prompted by EASA AD 2024-0178, dated September 12, 2024 (EASA AD 2024-
0178) (also referred to as the MCAI), issued by EASA, which is the
Technical Agent for the Member States of the European Union. The MCAI
states that there were reports of cracked IPC shaft assembly front air
seals. Subsequent investigations identified possible change of the
vibration and flutter characteristics of the affected IPC shaft
assembly and identified a potential propagation of the cracking into
the IPC stage 1 disc. Such cracking could lead to IPC stage 1 disk
burst with consequent release of high energy debris and damage to the
airplane or failure of the IPC front seal and release of debris, which
could lead to an engine in-flight shutdown (IFSD) and in the case of a
dual IFSD could result in reduced control of the airplane.
In the NPRM, the FAA proposed to require an inspection of the
affected IPC shaft assembly for cracking and, depending on the results
of the inspection, repetitive inspections or replacement of the IPC
shaft assembly front air seals, as specified in EASA AD 2024-0178,
which is incorporated by reference.
You may examine the MCAI in the AD docket at <a href="http://regulations.gov">regulations.gov</a> under
Docket No. FAA-2024-2414.
Discussion of Final Airworthiness Directive
Comments
The FAA received comments from the Airline Pilots Association
International and The Boeing Company (Boeing) who supported the NPRM
without change.
Conclusion
These products have been approved by the 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, it has notified the FAA of the unsafe condition described in
the MCAI referenced above. The FAA reviewed the relevant data,
considered the comment(s) received, and determined that air safety
requires adopting the AD as proposed. Accordingly, the FAA is issuing
this AD to address the unsafe condition on these products.
Material Incorporated by Reference Under 1 CFR Part 51
The FAA reviewed EASA AD 2024-0178, which specifies procedures for
inspection of the affected IPC shaft assembly and replacement of the
IPC shaft assembly front air seals.
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 will affect 64 engines installed on
airplanes of U.S. registry.
The FAA estimates the following costs to comply with this AD:
Estimated Costs
----------------------------------------------------------------------------------------------------------------
Cost per Cost on U.S.
Action Labor cost Parts cost product operators
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Inspect IPC shaft assembly............ 5 work-hours x $85 per $0 $425 $27,200
hour = $425.
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The FAA estimates the following costs to do any necessary
replacements that would be required based on the results of the
inspection. The agency has no way of determining the number of engines
that might need these replacements.
On-Condition Costs
----------------------------------------------------------------------------------------------------------------
Cost per
Action Labor cost Parts cost product
----------------------------------------------------------------------------------------------------------------
Replace IPC shaft assembly front air seals.... 80 work-hours x $85 per hour = $7,000 $13,800
$6,800.
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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
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:
[[Page 10592]]
Authority: 49 U.S.C. 106(f), 40113, 44701.
Sec. 39.13 [Amended]
0
2. The FAA amends Sec. 39.13 by adding the following new airworthiness
directive:
2025-02-14 Rolls-Royce Deutschland Ltd & Co KG: Amendment 39-22947;
Docket No. FAA-2024-2414; Project Identifier MCAI-2024-00530-E.
(a) Effective Date
This airworthiness directive (AD) is effective April 1, 2025.
(b) Affected ADs
None.
(c) Applicability
This AD applies to Rolls-Royce Deutschland Ltd & Co KG Model
Trent 1000-AE3, Trent 1000-CE3, Trent 1000-D3, Trent 1000-G3, Trent
1000-H3, Trent 1000-J3, Trent 1000-K3, Trent 1000-L3, Trent 1000-M3,
Trent 1000-N3, Trent 1000-P3, Trent 1000-Q3, Trent 1000-R3, Trent
7000-72, and Trent 7000-72C engines.
(d) Subject
Joint Aircraft System Component (JASC) Code 7230, Turbine Engine
Compressor Section.
(e) Unsafe Condition
This AD was prompted by reports of cracked intermediate pressure
compressor (IPC) shaft assembly front air seals. The FAA is issuing
this AD to prevent an IPC stage 1 disk burst or failure of the IPC
front seal. The unsafe condition, if not addressed, could result in
an IPC stage 1 disk burst with consequent release of high energy
debris and damage to the airplane or failure of the IPC front seal
and release of debris, which could lead to an engine in-flight
shutdown (IFSD) and in the case of a dual IFSD could result in
reduced control of the airplane.
(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:
Perform all required actions within the compliance times specified
in, and in accordance with, European Union Aviation Safety Agency AD
2024-0178, dated September 12, 2024 (EASA AD 2024-0178).
(h) Exceptions to EASA AD 2024-0178
(1) Where EASA AD 2024-0178 refers to its effective date, this
AD requires using the effective date of this AD.
(2) Where the service information referenced in EASA AD 2024-
0178 specifies to reject the engine, this AD requires removing the
affected part from service.
(3) This AD does not adopt the Remarks paragraph of EASA AD
2024-0178.
(i) No Reporting Requirement
Although the service information referenced in EASA AD 2024-0178
specifies to submit certain information to the manufacturer, this AD
does not include that requirement.
(j) 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, AIR-520 Continued Operational
Safety 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#61202c2e22210700004f060e17"><span class="__cf_email__" data-cfemail="22636f6d61624443430c454d54">[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 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#dfbdbeadbdbeadbef1bcbeaab9b6bab3bb9fb9bebef1b8b0a9"><span class="__cf_email__" data-cfemail="ec8e8d9e8e8d9e8dc28f8d998a85898088ac8a8d8dc28b839a">[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.
(i) European Union Aviation Safety Agency (EASA) AD 2024-0178,
dated September 12, 2024.
(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#69282d1a290c081a08470c1c1b061908470c1c"><span class="__cf_email__" data-cfemail="2564615665404456440b4050574a55440b4050">[email protected]</span></a>; website: easa.europa.eu. You may
find this EASA AD on the EASA website at ad.easa.europa.eu.
(4) You may view this material at the FAA, Airworthiness
Products Section, Operational Safety Branch, 1200 District Avenue,
Burlington, MA 01803. 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#3b5d49155255484b5e584f5254557b555a495a155c544d"><span class="__cf_email__" data-cfemail="365044185f5845465355425f5958765857445718515940">[email protected]</span></a>.
Issued on February 19, 2025.
Suzanne Masterson,
Deputy Director, Integrated Certificate Management Division, Aircraft
Certification Service.
[FR Doc. 2025-03009 Filed 2-24-25; 8:45 am]
BILLING CODE 4910-13-P
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