Proposed Rule2022-21102
Airworthiness Directives; Rolls-Royce Deutschland Ltd. & Co KG (Type Certificate Previously Held by Rolls-Royce plc) Turbofan Engines
Primary source
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Published
September 30, 2022
Issuing agencies
Transportation DepartmentFederal Aviation Administration
Abstract
The FAA proposes to supersede Airworthiness Directive (AD) 2020-12-01, which applies to certain Rolls-Royce Deutschland Ltd. & Co KG (RRD) Trent XWB-75, Trent XWB-79, Trent XWB-79B, and Trent XWB-84 model turbofan engines. AD 2020-12-01 requires initial and repetitive inspections of the low-pressure compressor (LPC) outlet guide vane (OGV) outer mount ring assembly and, depending on the results of the inspections, possible replacement of the LPC OGV outer mount ring assembly. Since the FAA issued AD 2020-12-01, it was determined that these inspections are also necessary for RRD Trent XWB-97 model turbofan engines. This proposed AD would require initial and repetitive inspections of the LPC OGV outer mount ring assembly and, depending on the results of the inspections, replacement of the LPC OGV outer mount ring assembly, as specified in a European Union Aviation Safety Agency (EASA) AD, which is proposed for incorporation by reference (IBR). The FAA is proposing this AD to address the unsafe condition on these products.
Full Text
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<title>Federal Register, Volume 87 Issue 189 (Friday, September 30, 2022)</title>
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[Federal Register Volume 87, Number 189 (Friday, September 30, 2022)]
[Proposed Rules]
[Pages 59347-59350]
From the Federal Register Online via the Government Publishing Office [<a href="http://www.gpo.gov">www.gpo.gov</a>]
[FR Doc No: 2022-21102]
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DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 39
[Docket No. FAA-2022-1244; Project Identifier MCAI-2022-00872-E]
RIN 2120-AA64
Airworthiness Directives; Rolls-Royce Deutschland Ltd. & Co KG
(Type Certificate Previously Held by Rolls-Royce plc) Turbofan 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)
2020-12-01, which applies to certain Rolls-Royce Deutschland Ltd. & Co
KG (RRD) Trent XWB-75, Trent XWB-79, Trent XWB-79B, and Trent XWB-84
model turbofan engines. AD 2020-12-01 requires initial and repetitive
inspections of the low-pressure compressor (LPC) outlet guide vane
(OGV) outer mount ring assembly and, depending on the results of the
inspections, possible replacement of the LPC OGV outer mount ring
assembly. Since the FAA issued AD 2020-12-01, it was determined that
these inspections are also necessary for RRD Trent XWB-97 model
turbofan engines. This proposed AD would require initial and repetitive
inspections of the LPC OGV outer mount ring assembly and, depending on
the results of the
[[Page 59348]]
inspections, replacement of the LPC OGV outer mount ring assembly, as
specified in a European Union Aviation Safety Agency (EASA) AD, which
is proposed for incorporation by reference (IBR). The FAA is proposing
this AD to address the unsafe condition on these products.
DATES: The FAA must receive comments on this NPRM by November 14, 2022.
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-2022-1244; 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 EASA AD, any comments received, and
other information. The street address for Docket Operations is listed
above.
Material Incorporated by Reference:
<bullet> For material that is proposed for IBR 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#d09194a390b5b1a3b1feb5a5a2bfa0b1feb5a5"><span class="__cf_email__" data-cfemail="2f6e6b5c6f4a4e5c4e014a5a5d405f4e014a5a">[email protected]</span></a>. You may find this material on the
EASA website at ad.easa.europa.eu.
<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,
ECO Branch, FAA, 1200 District Avenue, Burlington, MA 01803; phone:
(781) 238-7241; email: <a href="/cdn-cgi/l/email-protection#88fbfde6efe5e7a6eca6ebe0e7c8eee9e9a6efe7fe"><span class="__cf_email__" data-cfemail="27545249404a48094309444f486741464609404851">[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-2022-1244; Project Identifier
MCAI-2022-00872-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
Sungmo Cho, Aviation Safety Engineer, ECO Branch, FAA, 1200 District
Avenue, Burlington, MA 01803. 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 2020-12-01, Amendment 39-21135 (85 FR 34959, June
8, 2020) (AD 2020-12-01), for certain RRD Trent XWB-75, Trent XWB-79,
Trent XWB-79B, and Trent XWB-84 model turbofan engines. AD 2020-12-01
was prompted by analysis by the manufacturer of the LPC OGV assembly
and LPC OGV outer mount ring assembly. The analysis predicted that when
the front engine mount is in the fail-safe condition, the most highly
stressed LPC OGV outer mount ring assembly has a life that could be
substantially less than one shop visit interval. AD 2020-12-01 requires
initial and repetitive inspections of the LPC OGV outer mount ring
assembly, and depending on the results of the inspections, possible
replacement of the OGV outer mount ring assembly. The agency issued AD
2020-12-01 to prevent failure of the front engine mount support
structure.
Actions Since AD 2020-12-01 Was Issued
Since the FAA issued AD 2020-12-01, EASA, which is the Technical
Agent for the Member States of the European Union, has issued EASA AD
2022-0129, dated June 30, 2022 (the MCAI) to address an unsafe
condition for all RRD Trent XWB-75, Trent XWB-79, Trent XWB-79B, Trent
XWB-84, and Trent XWB-97 model turbofan engines. The MCAI states that
EASA AD 2022-0129 superseded EASA AD 2019-0234. EASA AD 2019-0234
specified that operators perform repetitive inspections (on-wing or in-
shop) of the OGV outer mount ring assembly lug fillet area in
accordance with RRD Alert Non-Modification Service Bulletin (NMSB)
Trent XWB 72-AK188, Initial Issue, dated August 13, 2019. The
manufacturer subsequently revised the NMSB and determined that the
inspections of the LPC OGV outer mount ring assembly are also necessary
for RRD Trent XWB-97 model turbofan engines. In addition, manufacturer
analysis indicated that the on-wing inspections, previously specified
in RRD NMSB Trent XWB 72-AK188, original issue, dated August 13, 2019,
could be discontinued, and the interval of the in-shop inspection could
coincide with a qualified shop visit, as outlined in RRD NMSB Trent XWB
72-AK188, Revision 3, dated May 9, 2022. As a result, EASA issued EASA
AD 2022-0129 to discontinue the on-wing inspections, allow the in-shop
inspection interval to be adjusted, and expand the applicability to
include Trent XWB-97 model turbofan engines.
You may examine the MCAI in the AD docket at <a href="http://regulations.gov">regulations.gov</a> under
Docket No. FAA-2022-1244.
Related Service Information Under 1 CFR Part 51
The FAA reviewed EASA AD 2022-0129. This EASA AD specifies
instructions for performing fluorescent penetrant inspections (FPIs) of
the LPC OGV outer mount ring assembly.
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 ADDRESSES.
Other Related Service Information
The FAA reviewed RRD Alert NMSB Trent XWB 72-AK188, Revision 3,
dated May 9, 2022. This service information specifies procedures for
[[Page 59349]]
performing FPIs of the LPC OGV outer mount ring assembly.
FAA's Determination
This product has been approved by the aviation authority of another
country, and is approved for operation in the United States. Pursuant
to the FAA's bilateral agreement with the State of Design Authority,
the FAA has been notified of the unsafe condition described in the EASA
AD. The FAA is issuing this AD after determining that the unsafe
condition described previously is likely to exist or develop in other
products of the same type design.
Proposed AD Requirements in This NPRM
This proposed AD would retain none of the requirements of AD 2020-
12-01. This proposed AD would require accomplishing the actions
specified in EASA AD 2022-0129, described previously, as incorporated
by reference, except for any differences identified as exceptions in
the regulatory text of this proposed AD and except as discussed under
``Differences Between this Proposed AD and the EASA 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 2022-0129
in the FAA final rule. This proposed AD would, therefore, require
compliance with EASA AD 2022-0129 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 and
compliance times,'' compliance with this AD requirement is not limited
to the section titled ``Required Action(s) and Compliance Time(s)'' in
EASA AD 2022-0129. 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-
2022-1244 after the FAA final rule is published.
Differences Between This Proposed AD and the EASA AD
Where EASA AD 2022-0129 requires compliance from its effective
date, this AD requires using the effective date of this AD.
The ``Remarks'' section of EASA AD 2022-0129 is not incorporated by
reference in this AD.
Costs of Compliance
The FAA estimates that this AD, if adopted as proposed, would
affect 60 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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FPI the LPC OGV outer mount ring 3 work-hours x $85 per $0 $255 $15,300
assembly. hour = $255.
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The FAA estimates the following costs to do any necessary repairs
or replacements that would be required based on the results of the
proposed inspection. The agency has no way of determining the number of
aircraft that might need these repairs or replacements:
On-Condition Costs
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Cost per
Action Labor cost Parts cost product
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Repair LPC OGV outer mount ring assembly...... .5 work-hours x $85 per hour = $0 $42.50
$42.50.
Replace the LPC OGV outer mount ring assembly. 8 work-hours x $85 per hour = 2,418,121 2,418,801
$680.
Replace the OGV outer mount ring only......... 8 work-hours x $85 per hour = 894,319 894,999
$680.
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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.
[[Page 59350]]
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 2020-12-01, Amendment 39-21135 (85
FR 34959, June 8, 2020); and
0
b. Adding the following new airworthiness directive:
Rolls-Royce Deutschland Ltd. & Co KG (Type Certificate previously
held by Rolls-Royce plc) Turbofan Engines: Docket No. FAA-2022-1244;
Project Identifier MCAI-2022-00872-E.
(a) Comments Due Date
The FAA must receive comments on this airworthiness directive
(AD) action by November 14, 2022.
(b) Affected ADs
This AD replaces AD 2020-12-01, Amendment 39-21135 (85 FR 34959,
June 8, 2020) (AD 2020-12-01).
(c) Applicability
This AD applies to Rolls-Royce Deutschland Ltd. & Co KG (RRD)
Trent XWB-75, Trent XWB-79, Trent XWB-79B, Trent XWB-84, and Trent
XWB-97 model turbofan engines as identified in European Union
Aviation Safety Agency (EASA) AD 2022-0129, dated June 30, 2022.
(EASA AD 2022-0129).
(d) Subject
Joint Aircraft Service Component (JASC) Code 7120, Engine Mount
Sector.
(e) Unsafe Condition
This AD was prompted by analysis by the manufacturer of the low-
pressure compressor (LPC) outlet guide vane (OGV) assembly and LPC
OGV outer mount ring assembly. The analysis predicted that when the
front engine mount is in the fail-safe condition, the most highly
stressed LPC OGV outer mount ring assembly has a life that could be
substantially less than one shop visit interval. The FAA is issuing
this AD to prevent failure of the front engine mount support
structure. The unsafe condition, if not addressed, could result in
engine separation, reduced control of the airplane, and loss of the
airplane.
(f) Compliance
Comply with this AD within the compliance times specified,
unless already done.
(g) Required Actions
Perform all required actions within the compliance times
specified in, and in accordance with, EASA AD 2022-0129.
(h) Exceptions to EASA AD 2022-0129
(1) Where EASA AD 2022-0129 requires compliance from its
effective date, this AD requires using the effective date of this
AD.
(2) The ``Remarks'' section of EASA AD 2022-0129 is not
incorporated by reference in this AD.
(i) No Reporting Requirement
Although the service information referenced in EASA AD 2022-0129
specifies to submit certain information to the manufacturer, this AD
does not include that requirement.
(j) Special Flight Permit
Special flight permits are prohibited.
(k) Alternative Methods of Compliance (AMOCs)
The Manager, ECO Branch, FAA, has the authority to approve AMOCs
for this AD, if requested using the procedures found in Sec. 39.19.
In accordance with Sec. 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 certification
office, send it to the attention of the person identified in
paragraph (l) of this AD or email to: <a href="/cdn-cgi/l/email-protection#2869666d05696c056965676b684e4949064f475e"><span class="__cf_email__" data-cfemail="e4a5aaa1c9a5a0c9a5a9aba7a4828585ca838b92">[email protected]</span></a>. 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.
(l) Additional Information
For more information about this AD, contact Sungmo Cho, Aviation
Safety Engineer, ECO Branch, FAA, 1200 District Avenue, Burlington,
MA 01803; phone: (781) 238-7241; email: <a href="/cdn-cgi/l/email-protection#93e0e6fdf4fefcbdf7bdf0fbfcd3f5f2f2bdf4fce5"><span class="__cf_email__" data-cfemail="1566607b72787a3b713b767d7a557374743b727a63">[email protected]</span></a>.
(m) 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 AD 2022-0129, dated
June 30, 2022.
(ii) [Reserved]
(3) For EASA AD 2022-0129, contact EASA, Konrad-Adenauer-Ufer 3,
50668 Cologne, Germany; phone: +49 221 8999 000; email:
<a href="/cdn-cgi/l/email-protection#3c7d784f7c595d4f5d1259494e534c5d125949"><span class="__cf_email__" data-cfemail="5415102714313527357a3121263b24357a3121">[email protected]</span></a>. You may find this EASA AD on the EASA website at
ad.easa.europa.eu.
(4) You may view this service information 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 service information that is incorporated
by reference at the National Archives and Records Administration
(NARA). For information on the availability of this material at
NARA, email: <a href="/cdn-cgi/l/email-protection#7513075b1c1b06051016011c1a1b351b1407145b121a03"><span class="__cf_email__" data-cfemail="d0b6a2feb9bea3a0b5b3a4b9bfbe90beb1a2b1feb7bfa6">[email protected]</span></a>, or go to: <a href="http://www.archives.gov/federal-register/cfr/ibr-locations.html">www.archives.gov/federal-register/cfr/ibr-locations.html</a>.
Issued on September 23, 2022.
Christina Underwood,
Acting Director, Compliance & Airworthiness Division, Aircraft
Certification Service.
[FR Doc. 2022-21102 Filed 9-29-22; 8:45 am]
BILLING CODE 4910-13-P
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