Proposed Rule2024-28073
Airworthiness Directives; Rolls-Royce Deutschland Ltd & Co KG Engines
Primary source
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Published
December 2, 2024
Issuing agencies
Transportation DepartmentFederal Aviation Administration
Abstract
The FAA proposes to supersede Airworthiness Directive (AD) 2024-06-06, which applies to all Rolls-Royce Deutschland Ltd & Co KG (RRD) Model Trent7000-72 and Trent7000-72C engines. AD 2024-06-06 requires revising the airworthiness limitations section (ALS) of the operator's existing approved engine maintenance or inspection program, as applicable, to incorporate new or more restrictive tasks and limitations and associated thresholds and intervals for life-limited parts. Since the FAA issued AD 2024-06-06, the manufacturer has revised the engine time limits manual (TLM) to introduce new or more restrictive tasks and limitations and associated thresholds and intervals for life-limited parts, which prompted this AD. This proposed AD would require revising the ALS of the existing approved engine maintenance or inspection program, as applicable, to incorporate new or more restrictive tasks and limitations and associated thresholds and intervals for life-limited parts, as specified in a European Union Aviation Safety Agency (EASA) AD, which is proposed for incorporation by reference. The FAA is proposing this AD to address the unsafe condition on these products.
Full Text
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<title>Federal Register, Volume 89 Issue 231 (Monday, December 2, 2024)</title>
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[Federal Register Volume 89, Number 231 (Monday, December 2, 2024)]
[Proposed Rules]
[Pages 95139-95141]
From the Federal Register Online via the Government Publishing Office [<a href="http://www.gpo.gov">www.gpo.gov</a>]
[FR Doc No: 2024-28073]
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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.
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Federal Register / Vol. 89, No. 231 / Monday, December 2, 2024 /
Proposed Rules
[[Page 95139]]
DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 39
[Docket No. FAA-2024-2544; Project Identifier MCAI-2024-00569-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).
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SUMMARY: The FAA proposes to supersede Airworthiness Directive (AD)
2024-06-06, which applies to all Rolls-Royce Deutschland Ltd & Co KG
(RRD) Model Trent7000-72 and Trent7000-72C engines. AD 2024-06-06
requires revising the airworthiness limitations section (ALS) of the
operator's existing approved engine maintenance or inspection program,
as applicable, to incorporate new or more restrictive tasks and
limitations and associated thresholds and intervals for life-limited
parts. Since the FAA issued AD 2024-06-06, the manufacturer has revised
the engine time limits manual (TLM) to introduce new or more
restrictive tasks and limitations and associated thresholds and
intervals for life-limited parts, which prompted this AD. This proposed
AD would require revising the ALS of the existing approved engine
maintenance or inspection program, as applicable, to incorporate new or
more restrictive tasks and limitations and associated thresholds and
intervals for life-limited parts, as specified in a European Union
Aviation Safety Agency (EASA) AD, which is proposed for incorporation
by reference. The FAA is proposing this AD to address the unsafe
condition on these products.
DATES: The FAA must receive comments on this NPRM by January 16, 2025.
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-2024-2544; 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 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#2362675063464250420d4656514c53420d4656"><span class="__cf_email__" data-cfemail="a8e9ecdbe8cdc9dbc986cddddac7d8c986cddd">[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, Operational Safety
Branch, 1200 District Avenue, Burlington, MA 01803. For information on
the availability of this material at the FAA, call (817) 222-5110.
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#30525142525142511e5351455659555c54705651511e575f46"><span class="__cf_email__" data-cfemail="2c4e4d5e4e4d5e4d024f4d594a454940486c4a4d4d024b435a">[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 to an address listed
under ADDRESSES. Include ``Docket No. FAA-2024-2544; Project Identifier
MCAI-2024-00569-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 amend
the 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
Barbara Caufield, 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 issued AD 2024-06-06, Amendment 39-22711 (89 FR 26755,
April 16, 2024) (AD 2024-06-06), for all RRD Model Trent7000-72 and
Trent7000-72C engines. AD 2024-06-06 was prompted by MCAI originated by
EASA, which is the Technical Agent for the Member States of the
European Union. EASA issued EASA AD 2022-0248, dated December 14, 2022
(EASA AD 2022-0248), to address the manufacturer revising the engine
TLM life limits to introduce new or more restrictive tasks and
limitations and associated thresholds and intervals for life-limited
parts.
AD 2024-06-06 requires revising the ALS of the operator's existing
approved
[[Page 95140]]
engine maintenance or inspection program, as applicable, to incorporate
new or more restrictive tasks and limitations and associated thresholds
and intervals for life-limited parts. The FAA issued AD 2024-06-06 to
prevent failure of critical rotating parts, which, if not addressed,
could result in failure of one or more engines, loss of thrust control,
and loss of the airplane.
Actions Since AD 2024-06-06 was Issued
Since the FAA issued AD 2024-06-06, EASA has superseded EASA AD
2022-0248 and issued EASA AD 2024-0041, dated February 9, 2024 (EASA AD
2024-0041) (also referred to as the MCAI). The MCAI states that the
manufacturer published a revised engine TLM to introduce new or more
restrictive tasks and limitations and associated thresholds and
intervals for life-limited parts.
You may examine the MCAI in the AD docket at <a href="http://regulations.gov">regulations.gov</a> under
Docket No. FAA-2024-2544.
Material Incorporated by Reference Under 1 CFR Part 51
The FAA reviewed EASA AD 2024-0041, which specifies revising the
ALS of the existing approved engine maintenance or inspection program,
as applicable, to incorporate new or more restrictive tasks and
limitations and associated thresholds and intervals for life-limited
parts.
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.
FAA's Determination
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 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 retain none of the requirements of AD 2024-
0041. This proposed AD would require accomplishing the actions
specified in the MCAI, described previously, except as discussed under
``Differences Between this Proposed AD and the MCAI '' and identified
as exceptions in the regulatory text of this proposed AD.
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 since
coordinated with other manufacturers and CAAs to use this process. As a
result, the FAA proposes to incorporate by reference EASA AD 2024-0041
in the FAA final rule. This proposed AD would, therefore, require
compliance with EASA AD 2024-0041 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 the EASA AD does not
mean that operators need comply only with that section. For example,
where the AD requirement refers to ``all required actions within the
compliance times,'' compliance with this AD requirement is not limited
to the section titled ``Required Action(s) and Compliance Time(s)'' in
EASA AD 2024-0041. Service information required by the EASA AD for
compliance will be available at <a href="http://regulations.gov">regulations.gov</a> under Docket No. FAA-
2024-2544 after the FAA final rule is published.
Differences Between This Proposed AD and the MCAI
Where paragraph (3) of EASA AD 2024-0041 specifies revising the
approved Aircraft Maintenance Programme within 12 months after the
effective date of EASA AD 2022-0248, this proposed AD would require
revising the ALS of the existing approved engine maintenance or
inspection program, as applicable, within 30 days after the effective
date of this AD.
Costs of Compliance
The FAA estimates that this AD, if adopted as proposed, would
affect 54 engines installed on airplanes of U.S. registry.
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
----------------------------------------------------------------------------------------------------------------
Revise the ALS...................... 1 work-hour x $85 per $0 $85 $4,590
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 that the 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.
[[Page 95141]]
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:
0
a. Removing Airworthiness Directive 2024-06-06, Amendment 39-22711 (89
FR 26755, April 16, 2024); and
0
b. Adding the following new airworthiness directive:
Rolls-Royce Deutschland Ltd & Co KG: Docket No. FAA-2024-2544;
Project Identifier MCAI-2024-00569-E.
(a) Comments Due Date
The FAA must receive comments on this airworthiness directive
(AD) by January 16, 2025.
(b) Affected ADs
This AD replaces AD 2024-06-06, Amendment 39-22711 (89 FR 26755,
April 16, 2024).
(c) Applicability
This AD applies to Rolls-Royce Deutschland Ltd & Co KG Model
Trent7000-72 and Trent7000-72C engines.
(d) Subject
Joint Aircraft System Component (JASC) Code 7200, Engine
(Turbine/Turboprop).
(e) Unsafe Condition
This AD was prompted by the manufacturer revising the engine
time limits manual to introduce new or more restrictive tasks and
limitations and associated thresholds and intervals for life-limited
parts. The FAA is issuing this AD to prevent failure of critical
rotating parts. The unsafe condition, if not addressed, could result
in failure of one or more engines, loss of thrust control, and loss
of the airplane.
(f) Compliance
Comply with this AD within the compliance times specified,
unless already done.
(g) Required Actions
Except as specified in paragraph (h) of this AD: Perform all
required actions within the compliance times specified in, and in
accordance with, European Union Aviation Safety Agency AD 2024-0041,
dated February 9, 2024 (EASA AD 2024-0041).
(h) Exceptions to EASA AD 2024-0041
(1) Where EASA AD 2024-0041 defines the AMP as the approved
Aircraft Maintenance Programme containing the tasks on the basis of
which the scheduled maintenance is conducted to ensure the
continuing airworthiness of each operated engine, this AD defines
the AMP as the aircraft maintenance program containing the tasks on
the basis of which the scheduled maintenance is conducted to ensure
the continuing airworthiness of each operated airplane.
(2) Where EASA AD 2024-0041 refers to its effective date, this
AD requires using the effective date of this AD.
(3) This AD does not require compliance with paragraphs (1),
(2), (4), and (5) of EASA AD 2024-0041.
(4) Where paragraph (3) of EASA AD 2024-0041 specifies ``Within
12 months after the effective date of this AD, revise the approved
AMP,'' replace that text with ``Within 30 days after the effective
date of this AD, revise the airworthiness limitation section (ALS)
of the existing approved engine maintenance or inspection program,
as applicable.''
(5) This AD does not adopt the Remarks paragraph of EASA AD
2024-0041.
(i) Provisions for Alternative Actions and Intervals
After performing the actions required by paragraph (g) of this
AD, no alternative actions 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 2024-0041.
(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 of the 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#c88985878b88aea9a9e6afa7be"><span class="__cf_email__" data-cfemail="1455595b57547275753a737b62">[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#c3a1a2b1a1a2b1a2eda0a2b6a5aaa6afa783a5a2a2eda4acb5"><span class="__cf_email__" data-cfemail="35575447575447541b565440535c505951755354541b525a43">[email protected]</span></a>.
(l) 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.
(i) European Union Aviation Safety Agency (EASA) AD 2024-0041,
dated February 9, 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#2061645360454153410e4555524f50410e4555"><span class="__cf_email__" data-cfemail="1c5d586f5c797d6f7d3279696e736c7d327969">[email protected]</span></a>; website: easa.europa.eu. You may
find this material on the EASA website at ad.easa.europa.eu.
(4) You may view this material at FAA, 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#0563772b6c6b76756066716c6a6b456b6477642b626a73"><span class="__cf_email__" data-cfemail="0f697d2166617c7f6a6c7b6660614f616e7d6e21686079">[email protected]</span></a>.
Issued on November 22, 2024.
Peter A. White,
Deputy Director, Integrated Certificate Management Division, Aircraft
Certification Service.
[FR Doc. 2024-28073 Filed 11-29-24; 8:45 am]
BILLING CODE 4910-13-P
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