Proposed Rule2024-27660
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
November 26, 2024
Issuing agencies
Transportation DepartmentFederal Aviation Administration
Abstract
The FAA proposes to supersede Airworthiness Directive (AD) 2022-24-06, which applies to certain Rolls-Royce Deutschland Ltd & Co KG (RRD) Model BR700-710A1-10, BR700-710A2-20, and BR700-710C4-11 engines. AD 2022-24-06 requires initial and repetitive visual inspections of certain low-pressure compressor (LPC) rotor (fan) disks and replacement of any LPC rotor (fan) disk with cracks detected. AD 2022-24-06 also allows for modification of the engine in accordance with RRD service information as a terminating action to these inspections. Since the FAA issued AD 2022-24-06, the manufacturer published updated service information and revised the engine maintenance manual (EMM) to provide instructions for an improved ultrasonic inspection method, which prompted this AD. This proposed AD would require initial and repetitive visual inspections of certain LPC rotor (fan) disks and replacement of any LPC rotor (fan) disk with cracks detected and would allow modification of the engine as a terminating action to the inspections, 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 228 (Tuesday, November 26, 2024)</title>
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[Federal Register Volume 89, Number 228 (Tuesday, November 26, 2024)]
[Proposed Rules]
[Pages 93230-93233]
From the Federal Register Online via the Government Publishing Office [<a href="http://www.gpo.gov">www.gpo.gov</a>]
[FR Doc No: 2024-27660]
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DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 39
[Docket No. FAA-2024-2538; Project Identifier MCAI-2023-01211-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)
2022-24-06, which applies to certain Rolls-Royce Deutschland Ltd & Co
KG (RRD) Model BR700-710A1-10, BR700-710A2-20, and BR700-710C4-11
engines. AD 2022-24-06 requires initial and repetitive visual
inspections of certain low-pressure compressor (LPC) rotor (fan) disks
and replacement of any LPC rotor (fan) disk with cracks detected. AD
2022-24-06 also allows for modification of the engine in accordance
with RRD service information as a terminating action to these
inspections. Since the FAA issued AD 2022-24-06, the manufacturer
published updated service information and revised the engine
maintenance manual (EMM) to provide instructions for an improved
ultrasonic inspection method, which prompted this AD. This proposed AD
would require initial and repetitive visual inspections of certain LPC
rotor (fan) disks and replacement of any LPC rotor (fan) disk with
cracks detected and would allow modification of the engine as a
terminating action to the inspections, 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 10, 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-2024-2538; 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#7534310635101406145b1000071a05145b1000"><span class="__cf_email__" data-cfemail="3273764172575341531c5747405d42531c5747">[email protected]</span></a>. 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
[[Page 93231]]
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#2a484b58484b584b04494b5f4c434f464e6a4c4b4b044d455c"><span class="__cf_email__" data-cfemail="f597948797948794db969480939c909991b5939494db929a83">[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-2024-2538; Project Identifier
MCAI-2023-01211-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 2022-24-06, Amendment 39-22246 (87 FR 73919,
December 2, 2022) (AD 2022-24-06), for certain RRD Model BR700-710A1-
10, BR700-710A2-20, and BR700-710C4-11 engines. AD 2022-24-06 was
prompted by an MCAI originated by EASA, which is the Technical Agent
for the Member States of the European Union. EASA issued AD 2022-0110,
dated June 15, 2022 (EASA AD 2022-0110), to correct an unsafe condition
identified as cracks on certain LPC rotor (fan) disks.
AD 2022-24-06 requires initial and repetitive visual inspections of
certain LPC rotor (fan) disks and replacement of any LPC rotor (fan)
disk with cracks detected. The FAA issued AD 2022-24-06 to prevent
failure of the LPC rotor fan or blade.
Actions Since AD 2022-24-06 Was Issued
Since the FAA issued AD 2022-24-06, EASA superseded EASA AD 2022-
0110 and issued AD 2022-0110R1, dated November 22, 2023 (EASA AD 2022-
0110R1) (also referred to as the MCAI). The MCAI states that the
manufacturer published updated service information and revised the EMM
to provide instructions for an improved ultrasonic inspection method
for certain LPC rotor (fan) disks.
You may examine the MCAI in the AD docket at <a href="http://regulations.gov">regulations.gov</a> under
Docket No. FAA-2024-2538.
Material Incorporated by Reference Under 1 CFR Part 51
The FAA reviewed EASA AD 2022-0110R1, which specifies procedures
for initial and repetitive visual inspections of certain LPC rotor
(fan) disks, and replacement of any LPC rotor (fan) disk with cracks
detected. 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 all of the requirements of AD 2022-
24-06. 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.
Costs of Compliance
The FAA estimates that this AD, if adopted as proposed, would
affect 586 engines installed on airplanes of U.S. registry.
The FAA estimates the following costs to comply with this proposed
AD:
Estimated Costs
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Cost per Cost on U.S.
Action Labor cost Parts cost product operators
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Inspect LPC compressor rotor (fan) 4 work-hours x $85 per hour $0 $340 $199,240
disk. = $340.
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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
proposed inspection. The agency has no way of determining the number of
engines that might need these replacements:
[[Page 93232]]
On-Condition Costs
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Cost per
Action Labor cost Parts cost product
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Replace LPC compressor rotor (fan) disk.... 10 work-hours x $85 per hour = $850 $470,000 $470,850
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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.
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 2022-24-06, Amendment 39-22246 (87
FR 73919, December 2, 2022); and
0
b. Adding the following new airworthiness directive:
Rolls-Royce Deutschland Ltd & Co KG: Docket No. FAA-2024-2538;
Project Identifier MCAI-2023-01211-E.
(a) Comments Due Date
The FAA must receive comments on this airworthiness directive
(AD) by January 10, 2025.
(b) Affected ADs
This AD replaces AD 2022-24-06, Amendment 39-22246 (87 FR 73919,
December 2, 2022) (AD 2022-24-06).
(c) Applicability
This AD applies to Rolls-Royce Deutschland Ltd & Co KG (RRD)
Model BR700-710A1-10, BR700-710A2-20, and BR700-710C4-11 engines as
identified in European Union Aviation Safety Agency AD 2022-0110R1,
dated November 22, 2023 (EASA AD 2022-0110R1).
(d) Subject
Joint Aircraft Service Component (JASC) Code 7230, Turbine
Engine Compressor Section.
(e) Unsafe Condition
This AD was prompted by reports of cracks on certain low-
pressure compressor (LPC) rotor (fan) disks. The FAA is issuing this
AD to prevent failure of the LPC rotor fan or blade. The unsafe
condition, if not addressed, could result in high energy debris
release, damage to the airplane, and 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, EASA AD 2022-0110R1.
(h) Exceptions to EASA AD 2022-0110R1
(1) Where EASA AD 2022-0110R1 requires compliance from its
effective date, this AD requires using the effective date of this
AD.
(2) Where EASA AD 2022-0110R1 requires compliance from ``29 June
2022 [the effective date of the original issue of this AD],'' this
AD requires replacing that text with ``January 6, 2023 (the
effective date of AD 2022-24-06).''
(3) This AD does not require compliance with paragraph (7) of
EASA AD 2022-0110R1. The actions required by paragraph 7 of EASA AD
2022-0110R1 were included in AD 2022-26-02, Amendment 39-22280 (87
FR 78846, December 23, 2022), and for this AD may be used for
informational purposes.
(4) This AD does not adopt the ``Remarks'' paragraph of EASA AD
2022-0110R1.
(i) No Reporting Requirement
Although the service information referenced in EASA AD 2022-
0110R1 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 of 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#a9e8e4e6eae9cfc8c887cec6df"><span class="__cf_email__" data-cfemail="85c4c8cac6c5e3e4e4abe2eaf3">[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#93f1f2e1f1f2e1f2bdf0f2e6f5faf6fff7d3f5f2f2bdf4fce5"><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 2022-0110R1,
dated November 22, 2023.
(ii) [Reserved]
[[Page 93233]]
(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#6120251221040012004f0414130e11004f0414"><span class="__cf_email__" data-cfemail="36777245765357455718534344594657185343">[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 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#90f6e2bef9fee3e0f5f3e4f9fffed0fef1e2f1bef7ffe6"><span class="__cf_email__" data-cfemail="e08692ce898e9390858394898f8ea08e819281ce878f96">[email protected]</span></a>.
Issued on November 20, 2024.
Peter A. White,
Deputy Director, Integrated Certificate Management Division, Aircraft
Certification Service.
[FR Doc. 2024-27660 Filed 11-25-24; 8:45 am]
BILLING CODE 4910-13-P
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