Proposed Rule2024-01248
Airworthiness Directives; Rolls-Royce Deutschland Ltd & Co KG Engines
Primary source
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Published
January 24, 2024
Issuing agencies
Transportation DepartmentFederal Aviation Administration
Abstract
The FAA proposes to adopt a new airworthiness directive (AD) for all Rolls-Royce Deutschland Ltd & Co KG (RRD) Model Trent 1000-A, Trent 1000-A2, Trent 1000-AE, Trent 1000-AE2, Trent 1000-C, Trent 1000- C2, Trent 1000-CE, Trent 1000-CE2, Trent 1000-D, Trent 1000-D2, Trent 1000-E, Trent 1000-E2, Trent 1000-G, Trent 1000-G2, Trent 1000-H, Trent 1000-H2, Trent 1000-J2, Trent 1000-K2, and Trent 1000-L2 engines. This proposed AD was prompted by reports of wear in the combining spill valve (CSV) assembly of certain hydro-mechanical units (HMUs). This proposed AD would require removing certain HMUs from service and replacing with a serviceable part. This proposed AD would also prohibit installation of certain HMUs unless the HMU is a serviceable part or the CSV assembly has been replaced, 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 16 (Wednesday, January 24, 2024)</title>
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[Federal Register Volume 89, Number 16 (Wednesday, January 24, 2024)]
[Proposed Rules]
[Pages 4582-4584]
From the Federal Register Online via the Government Publishing Office [<a href="http://www.gpo.gov">www.gpo.gov</a>]
[FR Doc No: 2024-01248]
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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. 16 / Wednesday, January 24, 2024 /
Proposed Rules
[[Page 4582]]
DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 39
[Docket No. FAA-2024-0036; Project Identifier MCAI-2023-00731-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).
-----------------------------------------------------------------------
SUMMARY: The FAA proposes to adopt a new airworthiness directive (AD)
for all Rolls-Royce Deutschland Ltd & Co KG (RRD) Model Trent 1000-A,
Trent 1000-A2, Trent 1000-AE, Trent 1000-AE2, Trent 1000-C, Trent 1000-
C2, Trent 1000-CE, Trent 1000-CE2, Trent 1000-D, Trent 1000-D2, Trent
1000-E, Trent 1000-E2, Trent 1000-G, Trent 1000-G2, Trent 1000-H, Trent
1000-H2, Trent 1000-J2, Trent 1000-K2, and Trent 1000-L2 engines. This
proposed AD was prompted by reports of wear in the combining spill
valve (CSV) assembly of certain hydro-mechanical units (HMUs). This
proposed AD would require removing certain HMUs from service and
replacing with a serviceable part. This proposed AD would also prohibit
installation of certain HMUs unless the HMU is a serviceable part or
the CSV assembly has been replaced, 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 March 11, 2024.
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-2024-0036; 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 service information identified in this NPRM,
contact EASA, Konrad-Adenauer-Ufer 3, 50668 Cologne, Germany; phone:
+49 221 8999 000; email: <a href="/cdn-cgi/l/email-protection#eeafaa9dae8b8f9d8fc08b9b9c819e8fc08b9b"><span class="__cf_email__" data-cfemail="bffefbccffdadeccde91dacacdd0cfde91daca">[email protected]</span></a>; website: easa.europa.eu.
You may find this material on the EASA website at ad.easa.europa.eu. It
is also available at <a href="http://regulations.gov">regulations.gov</a> under Docket No. FAA-2024-0036.
<bullet> You may view this service information 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.
FOR FURTHER INFORMATION CONTACT: Sungmo Cho, Aviation Safety Engineer,
FAA, 2200 South 216th Street, Des Moines, WA 98198; phone: (781) 238-
7241; email: <a href="/cdn-cgi/l/email-protection#c5b6b0aba2a8aaeba1eba6adaa85a3a4a4eba2aab3"><span class="__cf_email__" data-cfemail="bccfc9d2dbd1d392d892dfd4d3fcdadddd92dbd3ca">[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-2024-0036; Project Identifier
MCAI-2023-00731-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
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
Sungmo Cho, 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
EASA, which is the Technical Agent for the Member States of the
European Union, has issued EASA AD 2023-0113, dated June 1, 2023 (EASA
AD 2023-0113) (also referred to as the MCAI), to correct an unsafe
condition for all RRD Model Trent 1000-A, Trent 1000-A2, Trent 1000-AE,
Trent 1000-AE2, Trent 1000-C, Trent 1000-C2, Trent 1000-CE, Trent 1000-
CE2, Trent 1000-D, Trent 1000-D2, Trent 1000-E, Trent 1000-E2, Trent
1000-G, Trent 1000-G2, Trent 1000-H, Trent 1000-H2, Trent 1000-J2,
Trent 1000-K2 and Trent 1000-L2 engines. The MCAI states that
occurrences have been reported of finding wear in the CSV assembly of
certain HMUs. This wear can reduce the fuel flow output when the engine
is operated at high power conditions and
[[Page 4583]]
lead to thrust reduction. To address this unsafe condition, the
manufacturer published service information that specifies procedures to
remove certain HMUs from service and replace with a serviceable part.
The MCAI also specifies an implementation schedule, based on engine
flight-hour (EFH) limits, for replacement of each affected part with a
serviceable part and prohibits installation or reinstallation of
affected HMUs that have exceeded the allowable EFH limit unless the HMU
is a serviceable part or the CSV assembly has been replaced.
The FAA is proposing this AD to prevent thrust reduction, which if
not addressed, could result in reduced control 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-2024-0036.
Related Service Information Under 1 CFR Part 51
The FAA reviewed EASA AD 2023-0113, which specifies procedures for
removing certain part-numbered HMUs from service and replacing with a
serviceable part. The MCAI also specifies prohibiting installation or
reinstallation of an affected HMU on any engine unless the HMU is a
serviceable part.
This service information is reasonably available because the
interested parties have access to it through their normal course of
business or by the means identified in ADDRESSES.
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 require accomplishing the actions specified
in the MCAI described previously, except for any differences 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 2023-0113
in the FAA final rule. This proposed AD would, therefore, require
compliance with EASA AD 2023-0113 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 2023-0113. 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-
2024-0036 after the FAA final rule is published.
Costs of Compliance
The FAA estimates that this AD, if adopted as proposed, would
affect 28 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
----------------------------------------------------------------------------------------------------------------
Replace the HMU..................... 7 work-hours x $85 per $552,000 $552,595 $15,472,660
hour = $595.
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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 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.
[[Page 4584]]
Sec. 39.13 [Amended]
0
2. The FAA amends Sec. 39.13 by adding the following new airworthiness
directive:
Rolls-Royce Deutschland Ltd & Co KG: Docket No. FAA-2024-0036;
Project Identifier MCAI-2023-00731-E.
(a) Comments Due Date
The FAA must receive comments on this airworthiness directive
(AD) by March 11, 2024.
(b) Affected ADs
None.
(c) Applicability
This AD applies to Rolls-Royce Deutschland Ltd & Co KG Model
Trent 1000-A, Trent 1000-A2, Trent 1000-AE, Trent 1000-AE2, Trent
1000-C, Trent 1000-C2, Trent 1000-CE, Trent 1000-CE2, Trent 1000-D,
Trent 1000-D2, Trent 1000-E, Trent 1000-E2, Trent 1000-G, Trent
1000-G2, Trent 1000-H, Trent 1000-H2, Trent 1000-J2, Trent 1000-K2,
and Trent 1000-L2 engines.
(d) Subject
Joint Aircraft System Component (JASC) Code 7300, Engine Fuel
and Control.
(e) Unsafe Condition
This AD was prompted by reports of wear in the combining spill
valve (CSV) assembly of certain hydro-mechanical units (HMUs). The
FAA is issuing this AD to prevent thrust reduction. The unsafe
condition, if not addressed, 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 paragraph (h) of this AD: Perform all
required actions within the compliance times specified in, and in
accordance with, European Union Aviation Safety Agency (EASA) AD
2023-0113, dated June 1, 2023 (EASA AD 2023-0113).
(h) Exceptions to EASA AD 2023-0113
(1) Where EASA AD 2023-0113 refers to its effective date, this
AD requires using the effective date of this AD.
(2) Where Table 1 of EASA AD 2023-0113 specifies ``June 15,
2023'', replace that text with ``As of the effective date of this
AD.''
(3) Where Table 1 of EASA AD 2023-0113 specifies ``01 January
2025'', replace that text with ``Within 4 months after the effective
date of this AD or January 1, 2025, whichever occurs later.''
(4) Where the service information referenced in EASA AD 2023-
0013 specifies to discard certain parts, this AD requires those
parts to be removed from service.
(5) This AD does not adopt the Remarks paragraph of EASA AD
2023-0113.
(i) Definitions
For the purposes of this AD, the ``implementation date'' is
defined as the date that the applicable engine flight hour limit
takes effect.
(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#75343b305834315834383a36351314145b121a03"><span class="__cf_email__" data-cfemail="1859565d35595c355955575b587e7979367f776e">[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
For more information about this AD, contact Sungmo Cho, Aviation
Safety Engineer, FAA, 2200 South 216th Street, Des Moines, WA 98198;
phone: (781) 238-7241; email: <a href="/cdn-cgi/l/email-protection#dcafa9b2bbb1b3f2b8f2bfb4b39cbabdbdf2bbb3aa"><span class="__cf_email__" data-cfemail="a0d3d5cec7cdcf8ec48ec3c8cfe0c6c1c18ec7cfd6">[email protected]</span></a>.
(k) Material Incorporated by Reference
(1) The Director of the Federal Register approved the
incorporation by reference of the service information listed in this
paragraph under 5 U.S.C. 552(a) and 1 CFR part 51.
(2) You must use this service information as applicable to do
the actions required by this AD, unless the AD specifies otherwise.
(i) European Union Aviation Safety Agency (EASA) AD 2023-0113,
dated June 1, 2023.
(ii) [Reserved]
(3) For EASA AD 2023-0113, contact EASA, Konrad-Adenauer-Ufer 3,
50668 Cologne, Germany; phone: +49 221 8999 000; email:
<a href="/cdn-cgi/l/email-protection#5f1e1b2c1f3a3e2c3e713a2a2d302f3e713a2a"><span class="__cf_email__" data-cfemail="91d0d5e2d1f4f0e2f0bff4e4e3fee1f0bff4e4">[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 service information 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#88eefaa6e1e6fbf8edebfce1e7e6c8e6e9fae9a6efe7fe"><span class="__cf_email__" data-cfemail="7a1c08541314090a1f190e1315143a141b081b541d150c">[email protected]</span></a>.
Issued on January 17, 2024.
Victor Wicklund,
Deputy Director, Compliance & Airworthiness Division, Aircraft
Certification Service.
[FR Doc. 2024-01248 Filed 1-23-24; 8:45 am]
BILLING CODE 4910-13-P
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