Airworthiness Directives; Rolls-Royce Deutschland Ltd & Co KG Engines, 93230-93233 [2024-27660]
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Federal Register / Vol. 89, No. 228 / Tuesday, November 26, 2024 / Proposed Rules
(g) Required Actions
(1) Within the compliance times specified
in paragraphs (g)(1)(i) through (iii) of this AD,
replace the affected stage 1 turbine forward
cooling plate or stage 2 turbine aft cooling
plate, as applicable, with a replacement P/N
eligible for installation, in accordance with
Table 1 to paragraph (g)(1) of this AD:
(i) For Group 1 engines with an affected
part installed, replace the affected part at the
next exposure of the gas generator stator
assembly that occurs after the effective date
of this AD.
(ii) For Group 2 engines with an affected
part installed having 7,000 part cycles since
new (PCSN) or less as of the effective date
of this AD, replace the affected part at the
next exposure of the gas generator stator
assembly or within 2,000 flight cycles (FCs)
but before reaching 7,500 PCSN, whichever
occurs first after the effective date of this AD.
(iii) For Group 2 engines with an affected
part installed having more than 7,000 PCSN
as of the effective date of this AD, replace the
affected part at the next exposure of the gas
generator stator assembly or within 500 FCs,
whichever occurs first after the effective date
of this AD.
TABLE 1 TO PARAGRAPH (g)(1): COOLING PLATE REPLACEMENT P/NS
Engine group
1
1
1
2
............................
............................
............................
............................
2 ............................
2 ............................
Part name
Stage
Stage
Stage
Stage
1
2
2
1
turbine
turbine
turbine
turbine
forward cooling plate ............................................................
aft cooling plate ....................................................................
aft cooling plate ....................................................................
forward cooling plate ............................................................
6064T08P01
6064T07P05
6068T36P01
6064T08P01
Stage 2 turbine aft cooling plate ....................................................................
Stage 2 turbine aft cooling plate ....................................................................
6064T07P05
6068T36P01
(h) Definitions
For the purpose of this AD:
(1) ‘‘Group 1 engines’’ are GE Model CT7–
5A2, CT7–5A3, CT7–9B, CT7–9B1, CT7–9B2,
CT7–9D, and CT7–9D2 engines.
(2) ‘‘Group 2 engines’’ are GE Model CT7–
7A, CT7–7A1, CT7–9C, and CT7–9C3
engines.
(3) ‘‘Exposure of the gas generator stator
assembly’’ is when the gas generator rotor
and stator assembly are separated from the
combustor module.
(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:
AMOC@faa.gov.
(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.
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(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: sungmo.d.cho@faa.gov.
(k) Material Incorporated by Reference
None.
Issued on November 20, 2024.
Peter A. White,
Deputy Director, Integrated Certificate
Management Division, Aircraft Certification
Service.
[FR Doc. 2024–27664 Filed 11–25–24; 8:45 am]
BILLING CODE 4910–13–P
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17:36 Nov 25, 2024
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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
Federal Aviation
Administration (FAA), DOT.
ACTION: Notice of proposed rulemaking
(NPRM).
AGENCY:
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
SUMMARY:
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Replacement P/N
6064T08P04
6064T07P07
6068T36P04
6064T08P03 or
6064T08P04
6064T07P07
6068T36P04
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:
• Federal eRulemaking Portal: Go to
regulations.gov. Follow the instructions
for submitting comments.
• Fax: (202) 493–2251.
• 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.
• 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 regulations.gov 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:
• For EASA material identified in this
proposed AD, contact EASA, KonradAdenauer-Ufer 3, 50668 Cologne,
Germany; phone: +49 221 8999 000;
email: ADs@easa.europa.eu. You may
find this material on the EASA website
at ad.easa.europa.eu.
• You may view this material at the
FAA, Airworthiness Products Section,
Operational Safety Branch, 1200 District
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Federal Register / Vol. 89, No. 228 / Tuesday, November 26, 2024 / Proposed Rules
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: barbara.caufield@
faa.gov.
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
regulations.gov, 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.
93231
You may examine the MCAI in the
AD docket at regulations.gov 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:
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ESTIMATED COSTS
Action
Labor cost
Inspect LPC compressor rotor (fan) disk ........
4 work-hours × $85 per hour = $340 .............
The FAA estimates the following
costs to do any necessary replacements
that would be required based on the
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results of the proposed inspection. The
agency has no way of determining the
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Cost per
product
Parts cost
$0
$340
Cost on U.S.
operators
$199,240
number of engines that might need these
replacements:
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Federal Register / Vol. 89, No. 228 / Tuesday, November 26, 2024 / Proposed Rules
ON-CONDITION COSTS
Action
Labor cost
Replace LPC compressor rotor (fan) disk ....................
10 work-hours × $85 per hour = $850 .........................
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
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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.
1. The authority citation for part 39
continues to read as follows:
■
Authority: 49 U.S.C. 106(g), 40113, 44701.
[Amended]
2. The FAA amends § 39.13 by:
a. Removing Airworthiness Directive
2022–24–06, Amendment 39–22246 (87
FR 73919, December 2, 2022); and
■ 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.
List of Subjects in 14 CFR Part 39
(f) Compliance
Air transportation, Aircraft, Aviation
safety, Incorporation by reference,
Safety.
Comply with this AD within the
compliance times specified, unless already
done.
The Proposed Amendment
(g) Required Actions
Accordingly, under the authority
delegated to me by the Administrator,
the FAA proposes to amend 14 CFR part
39 as follows:
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.
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$470,000
Cost per
product
$470,850
(h) Exceptions to EASA AD 2022–0110R1
PART 39—AIRWORTHINESS
DIRECTIVES
§ 39.13
Parts cost
(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:
AMOC@faa.gov.
(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: barbara.caufield@faa.gov.
(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]
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Federal Register / Vol. 89, No. 228 / Tuesday, November 26, 2024 / Proposed Rules
(3) For EASA material identified in this
AD, contact EASA, Konrad-Adenauer-Ufer 3,
50668 Cologne, Germany; phone: +49 221
8999 000; email: ADs@easa.europa.eu;
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 www.archives.gov/federal-register/cfr/
ibr-locations or email fr.inspection@nara.gov.
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
DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 71
[Docket No. FAA–2024–2512; Airspace
Docket No. 24–AEA–9]
RIN 2120–AA66
Amendment of Domestic Very High
Frequency Omnidirectional Range
(VOR) Federal Airways V–1, V–29, V–
38, V–139, and V–286; Eastern United
States
Federal Aviation
Administration (FAA), DOT.
ACTION: Notice of proposed rulemaking
(NPRM).
AGENCY:
FOR FURTHER INFORMATION CONTACT:
Brian Vidis, Rules and Regulations
Group, Policy Directorate, Federal
Aviation Administration, 600
Independence Avenue SW, Washington,
DC 20597; telephone: (202) 267–8783.
SUPPLEMENTARY INFORMATION:
Authority for This Rulemaking
Comments must be received on
or before January 10, 2025.
ADDRESSES: Send comments identified
by FAA Docket No. FAA–2024–2512
and Airspace Docket No. 24–AEA–9
using any of the following methods:
* Federal eRulemaking Portal: Go to
www.regulations.gov and follow the
The FAA’s authority to issue rules
regarding aviation safety is found in
Title 49 of the United States Code.
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. This rulemaking is
promulgated under the authority
described in Subtitle VII, Part A,
Subpart I, section 40103. Under that
section, the FAA is charged with
prescribing regulations to assign the use
of the airspace necessary to ensure the
safety of aircraft and the efficient use of
airspace. This regulation is within the
scope of that authority as it amends the
route structure to maintain the efficient
flow of air traffic within the National
Airspace System (NAS).
DATES:
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Comments Invited
The FAA invites interested persons to
participate in this rulemaking by
submitting written comments, data, or
views. Comments are specifically
invited on the overall regulatory,
aeronautical, economic, environmental,
and energy-related aspects of the
proposal. The most helpful comments
reference a specific portion of the
proposal, explain the reason for any
recommended change, and include
supporting data. To ensure the docket
does not contain duplicate comments,
commenters should submit only one
time if comments are filed
electronically, or commenters should
send only one copy of written
comments if comments are filed in
writing.
The FAA will file in the docket all
comments it receives, as well as a report
summarizing each substantive public
contact with FAA personnel concerning
this proposed rulemaking. Before acting
on this proposal, the FAA will consider
all comments it receives on or before the
closing date for comments. The FAA
will consider comments filed after the
comment period has closed if it is
possible to do so without incurring
expense or delay. The FAA may change
this proposal in light of the comments
it receives.
Privacy: In accordance with 5 U.S.C.
553(c), DOT solicits comments from the
public to better inform its rulemaking
process. DOT posts these comments,
without edit, including any personal
information the commenter provides, to
www.regulations.gov, as described in
the system of records notice (DOT/ALL–
14 FDMS), which can be reviewed at
www.dot.gov/privacy.
Availability of Rulemaking Documents
SUMMARY:
This action proposes to
amend domestic Very High Frequency
Omnidirectional Range (VOR) Federal
Airways V–1, V–29, V–38, V–139, and
V–286 in the eastern United States. The
FAA is taking this action due to the
planned decommissioning of the
Salisbury, MD (SBY) VOR/Tactical Air
Navigation (VORTAC) and the Snow
Hill, MD (SWL), VORTAC. This action
is in support of the FAA’s VOR
Minimum Operational Network (MON)
Program.
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online instructions for sending your
comments electronically.
* Mail: Send comments to Docket
Operations, M–30; U.S. Department of
Transportation, 1200 New Jersey
Avenue SE, Room W12–140, West
Building Ground Floor, Washington, DC
20590–0001.
* Hand Delivery or Courier: Take
comments to Docket Operations in
Room W12–140 of the West Building
Ground Floor at 1200 New Jersey
Avenue SE, Washington, DC, between 9
a.m. and 5 p.m., Monday through
Friday, except Federal holidays.
* Fax: Fax comments to Docket
Operations at (202) 493–2251.
Docket: Background documents or
comments received may be read at
www.regulations.gov at any time.
Follow the online instructions for
accessing the docket or go to the Docket
Operations in Room W12–140 of the
West Building Ground Floor at 1200
New Jersey Avenue SE, Washington,
DC, between 9 a.m. and 5 p.m., Monday
through Friday, except Federal holidays.
FAA Order JO 7400.11J, Airspace
Designations and Reporting Points, and
subsequent amendments can be viewed
online at www.faa.gov/air_traffic/
publications/. You may also contact the
Rules and Regulations Group, Policy
Directorate, Federal Aviation
Administration, 600 Independence
Avenue SW, Washington, DC 20597;
telephone: (202) 267–8783.
93233
An electronic copy of this document
may be downloaded through the
internet at www.regulations.gov.
Recently published rulemaking
documents can also be accessed through
the FAA’s web page at www.faa.gov/air_
traffic/publications/airspace_
amendments/.
You may review the public docket
containing the proposal, any comments
received and any final disposition in
person in the Dockets Operations office
(see ADDRESSES section for address,
phone number, and hours of
operations). An informal docket may
also be examined during normal
business hours at the office of the
Eastern Service Center, Federal Aviation
Administration, Room 210, 1701
Columbia Avenue, College Park, GA
30337.
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]]>Agencies
[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 [www.gpo.gov]
[FR Doc No: 2024-27660]
-----------------------------------------------------------------------
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:
Federal eRulemaking Portal: Go to regulations.gov. Follow
the instructions for submitting comments.
Fax: (202) 493-2251.
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.
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 regulations.gov 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:
For EASA material identified in this proposed AD, contact
EASA, Konrad-Adenauer-Ufer 3, 50668 Cologne, Germany; phone: +49 221
8999 000; email: [email protected]. You may find this material on the
EASA website at ad.easa.europa.eu.
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: [email protected].
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
regulations.gov, 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 regulations.gov 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
----------------------------------------------------------------------------------------------------------------
Cost per
Action Labor cost Parts cost product
----------------------------------------------------------------------------------------------------------------
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: [email protected].
(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: [email protected].
(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: [email protected]; 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 www.archives.gov/federal-register/cfr/ibr-locations or email [email protected].
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
