Airworthiness Directives; General Electric Company Engines, 76117-76122 [2023-24386]
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Federal Register / Vol. 88, No. 213 / Monday, November 6, 2023 / Rules and Regulations
Issued on October 26, 2023.
Caitlin Locke,
Director, Compliance & Airworthiness
Division, Aircraft Certification Service.
[FR Doc. 2023–24387 Filed 11–3–23; 8:45 am]
BILLING CODE 4910–13–P
DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 39
[Docket No. FAA–2022–1314; Project
Identifier AD–2021–00811–E; Amendment
39–22579; AD 2023–21–07]
RIN 2120–AA64
Airworthiness Directives; General
Electric Company Engines
Federal Aviation
Administration (FAA), DOT.
ACTION: Final rule.
AGENCY:
The FAA is superseding
Airworthiness Directive (AD) 2018–03–
13 for certain General Electric Company
(GE) Model CT7–5A2, CT7–5A3, CT7–
7A, CT7–7A1, CT7–9B, CT7–9B1, CT7–
9B2, CT7–9C, and CT7–9C3 engines. AD
2018–03–13 required initial and
repetitive visual inspections and
fluorescent penetrant inspections (FPIs)
of the main propeller shaft. This AD was
prompted by an in-flight failure of a
main propeller shaft on a GE Model
CT7–9B engine, resulting in the loss of
the propeller. This AD requires initial
and repetitive visual inspections, FPIs,
and ultrasonic inspections (USIs) of the
main propeller shaft. Depending on the
results of these inspections, this AD
requires replacement of the main
propeller shaft. As an optional
terminating action to these inspections,
this AD requires revising the
airworthiness limitations section (ALS)
of the existing maintenance manual
(MM) and the operator’s existing
approved maintenance program or
inspection program, as applicable, to
incorporate incorporating the tasks and
reduced inspection thresholds for the
main propeller shaft. The FAA is
issuing this AD to address the unsafe
condition on these products.
DATES: This AD is effective December
11, 2023.
The Director of the Federal Register
approved the incorporation by reference
of a certain publication listed in this AD
as of December 11, 2023.
ADDRESSES:
AD Docket: You may examine the AD
docket at regulations.gov under Docket
No. FAA–2022–1314; or in person at
Docket Operations between 9 a.m. and
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SUMMARY:
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16:25 Nov 03, 2023
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5 p.m., Monday through Friday, except
Federal holidays. The AD docket
contains this final rule, any comments
received, and other information. The
address for Docket Operations is U.S.
Department of Transportation, Docket
Operations, M–30, West Building
Ground Floor, Room W12–140, 1200
New Jersey Avenue SE, Washington, DC
20590.
Material Incorporated by Reference:
• For GE service information
identified in this final rule, contact
General Electric Company, 1 Neumann
Way, Cincinnati, OH 45215; phone:
(513) 552–3272; email:
aviation.fleetsupport@ae.ge.com;
website: ge.com.
• 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. It is also
available at regulations.gov under
Docket No. FAA–2022–1314.
FOR FURTHER INFORMATION 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.
SUPPLEMENTARY INFORMATION:
Background
The FAA issued a supplemental
notice of proposed rulemaking (SNPRM)
to amend 14 CFR part 39 to supersede
AD 2018–03–13, Amendment 39–19186
(83 FR 6125, February 13, 2018) (AD
2018–03–13). AD 2018–03–13 applied
to certain GE Model CT7–5A2, CT7–
5A3, CT7–7A, CT7–7A1, CT7–9B, CT7–
9B1, CT7–9B2, CT7–9C and CT7–9C3
engines. The SNPRM published in the
Federal Register on July 11, 2023 (88 FR
44068). The SNPRM was prompted by a
comment from GE Aerospace on the
notice of proposed rulemaking (NPRM).
GE Aerospace stated that certain engine
models were included in incorrect
Figures within the Required Actions
paragraph of the NPRM, which would
attribute inaccurate inspection
thresholds to those engine models.
Therefore, the FAA issued the SNPRM
with a revision to Figures 1 and 2 to
include the correct engine models. The
FAA also updated the affected engine
models listed in paragraphs (g)(1) and
(g)(2) of the SNPRM to correspond with
the corrected engine models referenced
in Figures 1 and 2.
In the SNPRM, the FAA proposed to
require initial and repetitive visual
inspections, FPIs, and USIs of the main
propeller shaft. Depending on the
results of these inspections, the SNPRM
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76117
proposed to require replacing the main
propeller shaft. As an optional
terminating action to these inspections,
the SNPRM proposed to require revising
the ALS of the existing MM and the
operator’s existing approved
maintenance program or inspection
program, as applicable, to incorporate
the tasks and reduced inspection
thresholds for the main propeller shaft.
The FAA is issuing this AD to address
the unsafe condition on these products.
Discussion of Final Airworthiness
Directive
Comments
The FAA received comments from
one commenter, GE Aerospace. The
following presents the comment
received on the SNPRM and the FAA’s
response to that comment.
Request To Remove Typographical
Error From SNPRM
GE noted that there is a typological
[typographical] error in the ‘‘Proposed
AD Requirements in This SNPRM’’
paragraph of the SNPRM in which the
words ‘‘at least’’ are repeated in
succession.
The FAA agrees, however, the
‘‘Proposed AD Requirements in This
SNPRM’’ paragraph is not included in
this Final Rule. The FAA did not change
this AD as a result of this comment.
Conclusion
The FAA reviewed the relevant data,
considered any comments received, and
determined that air safety requires
adopting the AD as proposed.
Accordingly, the FAA is issuing this AD
to address the unsafe condition on these
products. Except for minor editorial
changes and any other changes
described previously, this AD is
adopted as proposed in the SNPRM.
None of the changes will increase the
economic burden on any operator.
Related Service Information Under 1
CFR Part 51
The FAA reviewed GE Service
Bulletin (SB) CT7–TP 72–0541 R01,
dated November 18, 2021 (GE SB CT7–
TP 72–0541). This service information
specifies procedures for performing
initial and repetitive visual inspections,
FPIs, and USIs of the main propeller
shaft.
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 the ADDRESSES section.
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Federal Register / Vol. 88, No. 213 / Monday, November 6, 2023 / Rules and Regulations
Costs of Compliance
The FAA estimates the following
costs to comply with this AD:
The FAA estimates that this AD
affects 176 engines installed on
airplanes of U.S. registry.
ESTIMATED COSTS
Action
Labor cost
Visually inspect, FPI, and USI the main propeller shaft.
2 work-hours × $85 per hour = $170 .............
The FAA estimates the following
costs to perform the optional
terminating action or to do any
necessary replacement that would be
Cost per
product
Parts cost
required based on the results of the
inspections. The agency has no way of
determining the number of operators
that will perform the optional
$0
$170
Cost on U.S.
operators
$29,920
terminating action or engines that might
need this replacement:
ON-CONDITION COSTS
Action
Labor cost
Replace the main propeller shaft .................................
Revise the ALS of the MM ...........................................
8 work-hours × $85 per hour = $680 ...........................
1 work-hour × $85 per hour = $85 ...............................
Authority for This Rulemaking
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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.
(2) Will not affect intrastate aviation
in Alaska, and
(3) Will 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 Amendment
Accordingly, under the authority
delegated to me by the Administrator,
the FAA amends 14 CFR part 39 as
follows:
PART 39—AIRWORTHINESS
DIRECTIVES
1. The authority citation for part 39
continues to read as follows:
■
Authority: 49 U.S.C. 106(g), 40113, 44701.
Regulatory Findings
§ 39.13
The FAA has determined that this AD
will not have federalism implications
under Executive Order 13132. This AD
will 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 this AD:
(1) Is not a ‘‘significant regulatory
action’’ under Executive Order 12866,
■
■
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2023–21–07 General Electric Company:
Amendment 39–22579; Docket No.
FAA–2022–1314; Project Identifier AD–
2021–00811–E.
(a) Effective Date
This airworthiness directive (AD) is
effective December 11, 2023.
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$48,360
0
Cost per
product
$49,040
85
(b) Affected ADs
This AD replaces AD 2018–03–13,
Amendment 39–19186 (83 FR 6125, February
13, 2018).
(c) Applicability
This AD applies to General Electric
Company (GE) Model CT7–5A2, CT7–5A3,
CT7–7A, CT7–7A1, CT7–9B, CT7–9B1, CT7–
9B2, CT7–9C, and CT7–9C3 engines.
(d) Subject
Joint Aircraft System Component (JASC)
Code 7210, Turbine Engine Reduction Gear.
(e) Unsafe Condition
This AD was prompted by an in-flight
failure of a main propeller shaft on a GE
Model CT7–9B model engine, resulting in the
loss of the propeller. The FAA is issuing this
AD to prevent failure of the main propeller
shaft. The unsafe condition, if not addressed,
could cause in-flight loss of the propeller,
loss of engine thrust control, and damage to
the airplane.
(f) Compliance
[Amended]
2. The FAA amends § 39.13 by:
a. Removing Airworthiness Directive
2018–03–13, Amendment 39–19186 (83
FR 6125, February 13, 2018); and
■ b. Adding the following new
airworthiness directive:
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Sfmt 4700
Comply with this AD within the
compliance times specified, unless already
done.
(g) Required Actions
(1) For affected CT7–5A2, CT7–5A3, CT7–
9B, CT7–9B1, and CT7–9B2 model engines,
using the compliance times specified in
Figure 1 to paragraph (g)(1) of this AD,
perform initial and repetitive visual
inspections, fluorescent penetrant
inspections (FPIs), and ultrasonic inspections
(USIs) of the main propeller shaft.
BILLING CODE 4910–13–P
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Federal Register / Vol. 88, No. 213 / Monday, November 6, 2023 / Rules and Regulations
76119
Figure 1 to Paragraph (g)(l)- Compliance Times for CT7-5A2, CT7-5A3, CT7-9B,
CT7-9Bl, and CT7-9B2 Model Engines
Inspection Type
Initial inspection of the
main propeller shaft
Repeat inspection interval
of main propeller shaft
Cleaning and
visual inspection
During first propeller
removal after the effective
date of this AD
Before exceeding 20,000
cycles since new (CSN) or
within 2, 100 flight hours
(FHs) after the effective
date of this AD, whichever
occurs later
Before exceeding 20,000
CSN or within 1,600 FHs
after the effective date of
this AD, whichever occurs
later
During every propeller
removal
FPI
USI
(2) For affected CT7–7A, CT7–7A1, CT7–
9C, and CT7–9C3 model engines, using the
During every propeller
removal or within 2, 100 FHs
from performance of the
previous FPI, whichever
occurs later
Before exceeding 5,000 FHs
from performance of the
previous USI
compliance times specified in Figure 2 to
paragraph (g)(2) of this AD, perform initial
and repetitive visual inspections, FPIs, and
USIs of the main propeller shaft.
Figure 2 to Paragraph (g)(2)-Compliance Times for CT7-7A, CT7-7Al, CT7-9C,
and CT7-9C3 Model Engines
Inspection Type
Initial inspection of the
main propeller shaft
Repeat inspection interval
of main propeller shaft
Cleaning and
visual inspection
During the first propeller
removal after the effective
date of this AD
Before exceeding 20,000
CSN or within 2,400 FHs
after the effective date of
this AD, whichever occurs
later
Before exceeding 20,000
CSN or within 1,600 FHs
after the effective date of
this AD, whichever occurs
later
During every propeller
removal
(3) Perform the visual inspections, FPIs,
and USIs required by paragraphs (g)(1) and
(2) of this AD as follows:
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(i) Prior to performance of the inspections,
clean the main propeller shaft flange using
the Accomplishment Instructions, paragraph
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3.B., of GE Service Bulletin (SB) CT7–TP 72–
0541 R01, dated November 18, 2021 (GE SB
CT7–TP 72–0541).
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USI
During every propeller
removal or within 2,400 FHs
from performance of the
previous FPI, whichever
occurs later
Before exceeding 4,800 FHs
from performance of the
previous USI
ER06NO23.056</GPH>
FPI
76120
Federal Register / Vol. 88, No. 213 / Monday, November 6, 2023 / Rules and Regulations
(ii) Visually inspect the main propeller
shaft for wear, corrosion, and cracking using
the Accomplishment Instructions, paragraph
3.C.(1), of GE SB CT7–TP 72–0541.
(iii) Spot-FPI the area on the main
propeller shaft flange face using the
Accomplishment Instructions, paragraph
3.C.(2)(a), of GE SB CT7–TP 72–0541.
(iv) USI the two dowel pin holes of the
main propeller shaft using the
Accomplishment Instructions, paragraph
3.C.(3)(a), of GE SB CT7–TP 72–0541.
(4) If a crack or rejectable indication is
found during the initial and repetitive visual
inspections, FPIs, or USIs required by
paragraphs (g)(1) through (3) of this AD,
before further flight, remove the main
propeller shaft from service and replace it
with a part eligible for installation.
(5) For all affected engines, if the main
propeller shaft CSN is unknown, use the
propeller gearbox (PGB) CSN. If the PGB CSN
is unknown, assume the inspection threshold
is exceeded.
(h) Optional Terminating Action
Accomplishing the actions in paragraphs
(h)(1) through (4) of this AD, as applicable by
engine model, constitutes terminating action
for the inspections required by paragraphs
(g)(1) through (3) of this AD.
(1) For affected CT7–5A2, CT7–5A3, CT7–
7A, and CT7–7A1 model engines, revise the
airworthiness limitations section (ALS) of the
existing maintenance manual (MM) and the
operator’s existing approved maintenance
program or inspection program, as
applicable, by incorporating the information
in Figure 3 to paragraph (h)(1) of this AD.
Figure 3 to Paragraph (h)(l) - CT7-5/-7 Inspection Threshold and Interval
Inspection /
Maintenance
Initial
Inspection
Threshold
(cycles since
new(CSN))
Repetitive
Inspection
Interval
Inspection /
Maintenance
Requirements
Reference
At every propeller
removal
VI
72-l0-00,
INSPECTION PROPELLER
GEARBOX
INSPECTION
paragraph 5.A.
*** FOR CT7-5
Visual inspection of the
main propeller shaft
Fluorescent penetrant
inspection (FPI) of the
main propeller shaft
20000 CSN (*)
At every propeller
removal or 2IO0
FH, whichever is
greater
FPI
72-l0-00.
Special
Procedure 005
Ultrasonic inspection
(UTI) of the main
propeller shaft
20000 CSN (*)
5000 FH
UTI
72-l0-00.
Special
Procedure 005
At every propeller
removal
VI
72-10-00,
INSPECTION PROPELLER
GEARBOX
INSPECTION
paragraph 5.A.
*** FOR CT7-7
Fluorescent penetrant
inspection (FPI) of the
main propeller shaft
20000 CSN (*)
At every propeller
removal or 2400
FH, whichever is
greater
FPI
72-l0-00.
Special
Procedure 005
Ultrasonic inspection
(UTI) of the main
propeller shaft
20000 CSN (*)
4800 FH
UTI
72-l0-00.
Special
Procedure 005
NOTE:(*) If the main propeller shaft accumulated time/cycle is unknown, inspection must be done based on
the propeller gearbox (PGB) accumulated time/cycle. If the PGB accumulated time/cycle is unknown, threshold
must be assumed exceeded.
(2) For affected CT7–9B, CT7–9B1, CT7–
9B2, CT7–9C, and CT7–9C3 model engines,
revise the ALS of the existing MM and the
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operator’s existing approved maintenance
program or inspection program, as
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applicable, by incorporating the information
in Figure 4 to paragraph (h)(2) of this AD.
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Visual inspection of the
main propeller shaft
Federal Register / Vol. 88, No. 213 / Monday, November 6, 2023 / Rules and Regulations
76121
Figure 4 to Paragraph (h)(2) - CT7-9 Inspection Threshold and Interval
Inspection /
Maintenance
Initial
Inspection
Threshold
(cycles since
new(CSN))
Repetitive
Inspection
Interval
Inspection /
Maintenance
Requirements
Reference
At every propeller
removal
VI
72-10-00,
INSPECTION PROPELLER
GEARBOX
INSPECTION
paragraph 5 .A.
*** FOR CT7-9B
Visual inspection of the
main propeller shaft
Fluorescent penetrant
inspection (FPI) of the
main propeller shaft
20000 CSN (*)
At every propeller
removal or 2100
FH, whichever is
greater
FPI
72-10-00. Special
Procedure 005
Ultrasonic inspection
(UTI) of the main
propeller shaft
20000 CSN (*)
5000 FH
UTI
72-10-00. Special
Procedure 005
At every propeller
removal
VI
72-10-00,
INSPECTION PROPELLER
GEARBOX
INSPECTION
paragraph 5 .A.
*** FOR CT7-9C/9C3
Visual inspection of the
main propeller shaft
Fluorescent penetrant
inspection (FPI) of the
main propeller shaft
20000 CSN (*)
At every propeller
removal or 2400
FH, whichever is
greater
FPI
72-10-00. Special
Procedure 005
Ultrasonic inspection
(UTI) of the main
propeller shaft
20000 CSN (*)
4800 FH
UTI
72-10-00. Special
Procedure 005
(3) Thereafter, except as provided in
paragraph (k) of this AD, no alternative
inspection times or intervals may be
approved for this main propeller shaft.
(4) The optional terminating actions in
paragraphs (h)(1) and (2) of this AD may be
performed by the owner/operator (pilot)
holding at least a private pilot certificate and
must be entered into the aircraft records
showing compliance with this AD in
accordance with 14 CFR 43.9(a) and
91.417(a)(2)(v). The record must be
maintained as required by 14 CFR 91.417,
121.380, or 135.439.
(i) Definition
For the purpose of this AD, a ‘‘part eligible
for installation’’ is a main propeller shaft that
has been inspected in accordance with
paragraphs (g)(1) or (2), and (3) of this AD,
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and there was no crack or rejectable
indication.
(j) Credit for Previous Actions
You may take credit for the initial visual
inspection, FPI, and USI required by
paragraphs (g)(1) through (3) of this AD if you
performed these initial inspections before the
effective date of this AD in accordance with
GE SB CT7–TP 72–0541 R00, dated
September 9, 2021.
(k) 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
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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 (l) of this AD and email it to: ANEAD-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.
(l) 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.
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NOTE: (*) If the main propeller shaft accumulated time/cycle is unknown, inspection must be done based on
the propeller gearbox (PGB) accumulated time/cycle. If the PGB accumulated time/cycle is unknown, threshold
must be assumed exceeded.
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Federal Register / Vol. 88, No. 213 / Monday, November 6, 2023 / Rules and Regulations
(m) Material Incorporated by Reference
(1) The Director of the Federal Register
approved the incorporation by reference
(IBR) 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) General Electric Company (GE) Service
Bulletin CT7–TP 72–0541 R01, dated
November 18, 2021.
(ii) [Reserved]
(3) For GE service information identified in
this AD, contact General Electric Company,
1 Neumann Way, Cincinnati, OH 45215;
phone: (513) 552–3272; email:
aviation.fleetsupport@ae.ge.com; website:
ge.com.
(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 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 October 20, 2023.
Ross Landes,
Deputy Director for Regulatory Operations,
Compliance & Airworthiness Division,
Aircraft Certification Service.
[FR Doc. 2023–24386 Filed 11–3–23; 8:45 am]
BILLING CODE 4910–13–C
DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 71
[Docket No. FAA–2023–0916; Airspace
Docket No. 22–AAL–85]
RIN 2120–AA66
Revocation of Alaskan Very High
Frequency Omnidirectional Range
(VOR) Federal Airway V–318; Level
Island, AK
Federal Aviation
Administration (FAA), DOT.
ACTION: Final rule.
AGENCY:
This action revokes Alaskan
VOR Federal Airway V–318 in the
vicinity of Level Island, AK. The FAA
is taking this action due to the airway’s
lack of use.
DATES: Effective date 0901 UTC, January
25, 2024. The Director of the Federal
Register approves this incorporation by
reference action under 1 CFR part 51,
subject to the annual revision of FAA
Order JO 7400.11 and publication of
conforming amendments.
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SUMMARY:
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16:25 Nov 03, 2023
Jkt 262001
A copy of the Notice of
Proposed Rulemaking (NPRM), all
comments received, this final rule, and
all background material may be viewed
online at www.regulations.gov using the
FAA Docket number. Electronic
retrieval help and guidelines are
available on the website. It is available
24 hours each day, 365 days each year.
FAA Order JO 7400.11H, 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, Office of
Policy, Federal Aviation
Administration, 800 Independence
Avenue SW, Washington DC 20591;
telephone: (202) 267–8783.
FOR FURTHER INFORMATION CONTACT:
Steven Roff, Rules and Regulations
Group, Office of Policy, Federal
Aviation Administration, 800
Independence Avenue SW, Washington,
DC 20591; telephone: (202) 267–8783.
SUPPLEMENTARY INFORMATION:
ADDRESSES:
Authority for This Rulemaking
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 would
modify the route structure as necessary
to preserve the safe and efficient flow of
air traffic within the National Airspace
System (NAS).
History
The FAA published an NPRM for
Docket No. FAA 2023–0916 in the
Federal Register (88 FR 23597; April 18,
2023), proposing to revoke Alaskan VOR
Federal Airway V–318. Interested
parties were invited to participate in
this rulemaking effort by submitting
written comments on the proposal. No
comments were received.
Incorporation by Reference
Alaskan VOR Federal Airways are
published in paragraph 6010 of FAA
Order JO 7400.11, Airspace
Designations and Reporting Points,
which is incorporated by reference in 14
CFR 71.1 on an annual basis. This
document amends the current version of
PO 00000
Frm 00026
Fmt 4700
Sfmt 4700
that order, FAA Order JO 7400.11H,
dated August 11, 2023, and effective
September 15, 2023. These updates will
be published in the next update to FAA
Order JO 7400.11. That order is publicly
available as listed in the ADDRESSES
section of this document.
FAA Order JO 7400.11H lists Class A,
B, C, D, and E airspace areas, air traffic
service routes, and reporting points.
The Rule
This action amends 14 CFR part 71 by
revoking Alaskan VOR Federal Airway
V–318 in its entirety.
Regulatory Notices and Analyses
The FAA has determined that this
regulation only involves an established
body of technical regulations for which
frequent and routine amendments are
necessary to keep them operationally
current. It, therefore: (1) is not a
‘‘significant regulatory action’’ under
Executive Order 12866; (2) is not a
‘‘significant rule’’ under DOT
Regulatory Policies and Procedures (44
FR 11034; February 26, 1979); and (3)
does not warrant preparation of a
regulatory evaluation as the anticipated
impact is so minimal. Since this is a
routine matter that only affects air traffic
procedures and air navigation, it is
certified that this rule, when
promulgated, does not have a significant
economic impact on a substantial
number of small entities under the
criteria of the Regulatory Flexibility Act.
Environmental Review
The FAA has determined that this
action of revoking Federal Airway V–
318 and replacing it with existing route
T–269 in the vicinity of Level Island,
AK qualifies for categorical exclusion
under the National Environmental
Policy Act (42 U.S.C. 4321 et seq.) and
its implementing regulations at 40 CFR
part 1500, and in accordance with FAA
Order 1050,1F, Environmental Impacts:
Policies and Procedures, paragraph 5–6–
5a, which categorically excludes from
further environmental impact review
rulemaking actions that designate or
modify classes of airspace areas,
airways, routes, and reporting points
(see 14 CFR part 71, Designation of
Class A, B, C, D and E Airspace Areas;
Air Traffic Service Routes; and
Reporting Points); and paragraph 5–
6.5.k., which categorically excludes
from further environmental review the
publication of existing air traffic control
procedures that do not essentially
change existing tracks, create new
tracks, change altitude, or change
concentration of aircraft on these tracks.
As such, this action is not expected to
result in in any potentially significant
E:\FR\FM\06NOR1.SGM
06NOR1
]]>Agencies
[Federal Register Volume 88, Number 213 (Monday, November 6, 2023)]
[Rules and Regulations]
[Pages 76117-76122]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 2023-24386]
-----------------------------------------------------------------------
DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 39
[Docket No. FAA-2022-1314; Project Identifier AD-2021-00811-E;
Amendment 39-22579; AD 2023-21-07]
RIN 2120-AA64
Airworthiness Directives; General Electric Company Engines
AGENCY: Federal Aviation Administration (FAA), DOT.
ACTION: Final rule.
-----------------------------------------------------------------------
SUMMARY: The FAA is superseding Airworthiness Directive (AD) 2018-03-13
for certain General Electric Company (GE) Model CT7-5A2, CT7-5A3, CT7-
7A, CT7-7A1, CT7-9B, CT7-9B1, CT7-9B2, CT7-9C, and CT7-9C3 engines. AD
2018-03-13 required initial and repetitive visual inspections and
fluorescent penetrant inspections (FPIs) of the main propeller shaft.
This AD was prompted by an in-flight failure of a main propeller shaft
on a GE Model CT7-9B engine, resulting in the loss of the propeller.
This AD requires initial and repetitive visual inspections, FPIs, and
ultrasonic inspections (USIs) of the main propeller shaft. Depending on
the results of these inspections, this AD requires replacement of the
main propeller shaft. As an optional terminating action to these
inspections, this AD requires revising the airworthiness limitations
section (ALS) of the existing maintenance manual (MM) and the
operator's existing approved maintenance program or inspection program,
as applicable, to incorporate incorporating the tasks and reduced
inspection thresholds for the main propeller shaft. The FAA is issuing
this AD to address the unsafe condition on these products.
DATES: This AD is effective December 11, 2023.
The Director of the Federal Register approved the incorporation by
reference of a certain publication listed in this AD as of December 11,
2023.
ADDRESSES:
AD Docket: You may examine the AD docket at regulations.gov under
Docket No. FAA-2022-1314; 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 final rule, any comments received, and other
information. The address for Docket Operations is U.S. Department of
Transportation, Docket Operations, M-30, West Building Ground Floor,
Room W12-140, 1200 New Jersey Avenue SE, Washington, DC 20590.
Material Incorporated by Reference:
For GE service information identified in this final rule,
contact General Electric Company, 1 Neumann Way, Cincinnati, OH 45215;
phone: (513) 552-3272; email: ge.com">aviation.fleetsupport@ae.ge.com; website:
ge.com.
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. It is
also available at regulations.gov under Docket No. FAA-2022-1314.
FOR FURTHER INFORMATION CONTACT: Sungmo Cho, Aviation Safety Engineer,
FAA, 2200 South 216th Street, Des Moines, WA 98198; phone: (781) 238-
7241; email: [email protected].
SUPPLEMENTARY INFORMATION:
Background
The FAA issued a supplemental notice of proposed rulemaking (SNPRM)
to amend 14 CFR part 39 to supersede AD 2018-03-13, Amendment 39-19186
(83 FR 6125, February 13, 2018) (AD 2018-03-13). AD 2018-03-13 applied
to certain GE Model CT7-5A2, CT7-5A3, CT7-7A, CT7-7A1, CT7-9B, CT7-9B1,
CT7-9B2, CT7-9C and CT7-9C3 engines. The SNPRM published in the Federal
Register on July 11, 2023 (88 FR 44068). The SNPRM was prompted by a
comment from GE Aerospace on the notice of proposed rulemaking (NPRM).
GE Aerospace stated that certain engine models were included in
incorrect Figures within the Required Actions paragraph of the NPRM,
which would attribute inaccurate inspection thresholds to those engine
models. Therefore, the FAA issued the SNPRM with a revision to Figures
1 and 2 to include the correct engine models. The FAA also updated the
affected engine models listed in paragraphs (g)(1) and (g)(2) of the
SNPRM to correspond with the corrected engine models referenced in
Figures 1 and 2.
In the SNPRM, the FAA proposed to require initial and repetitive
visual inspections, FPIs, and USIs of the main propeller shaft.
Depending on the results of these inspections, the SNPRM proposed to
require replacing the main propeller shaft. As an optional terminating
action to these inspections, the SNPRM proposed to require revising the
ALS of the existing MM and the operator's existing approved maintenance
program or inspection program, as applicable, to incorporate the tasks
and reduced inspection thresholds for the main propeller shaft. The FAA
is issuing this AD to address the unsafe condition on these products.
Discussion of Final Airworthiness Directive
Comments
The FAA received comments from one commenter, GE Aerospace. The
following presents the comment received on the SNPRM and the FAA's
response to that comment.
Request To Remove Typographical Error From SNPRM
GE noted that there is a typological [typographical] error in the
``Proposed AD Requirements in This SNPRM'' paragraph of the SNPRM in
which the words ``at least'' are repeated in succession.
The FAA agrees, however, the ``Proposed AD Requirements in This
SNPRM'' paragraph is not included in this Final Rule. The FAA did not
change this AD as a result of this comment.
Conclusion
The FAA reviewed the relevant data, considered any comments
received, and determined that air safety requires adopting the AD as
proposed. Accordingly, the FAA is issuing this AD to address the unsafe
condition on these products. Except for minor editorial changes and any
other changes described previously, this AD is adopted as proposed in
the SNPRM. None of the changes will increase the economic burden on any
operator.
Related Service Information Under 1 CFR Part 51
The FAA reviewed GE Service Bulletin (SB) CT7-TP 72-0541 R01, dated
November 18, 2021 (GE SB CT7-TP 72-0541). This service information
specifies procedures for performing initial and repetitive visual
inspections, FPIs, and USIs of the main propeller shaft.
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 the ADDRESSES section.
[[Page 76118]]
Costs of Compliance
The FAA estimates that this AD affects 176 engines installed on
airplanes of U.S. registry.
The FAA estimates the following costs to comply with this AD:
Estimated Costs
----------------------------------------------------------------------------------------------------------------
Cost per Cost on U.S.
Action Labor cost Parts cost product operators
----------------------------------------------------------------------------------------------------------------
Visually inspect, FPI, and USI the 2 work-hours x $85 per $0 $170 $29,920
main propeller shaft. hour = $170.
----------------------------------------------------------------------------------------------------------------
The FAA estimates the following costs to perform the optional
terminating action or to do any necessary replacement that would be
required based on the results of the inspections. The agency has no way
of determining the number of operators that will perform the optional
terminating action or engines that might need this replacement:
On-Condition Costs
----------------------------------------------------------------------------------------------------------------
Cost per
Action Labor cost Parts cost product
----------------------------------------------------------------------------------------------------------------
Replace the main propeller shaft.............. 8 work-hours x $85 per hour = $48,360 $49,040
$680.
Revise the ALS of the MM...................... 1 work-hour x $85 per hour = $85 0 85
----------------------------------------------------------------------------------------------------------------
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 has determined that this AD will not have federalism
implications under Executive Order 13132. This AD will 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 this AD:
(1) Is not a ``significant regulatory action'' under Executive
Order 12866,
(2) Will not affect intrastate aviation in Alaska, and
(3) Will 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 Amendment
Accordingly, under the authority delegated to me by the
Administrator, the FAA amends 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 2018-03-13, Amendment 39-19186 (83
FR 6125, February 13, 2018); and
0
b. Adding the following new airworthiness directive:
2023-21-07 General Electric Company: Amendment 39-22579; Docket No.
FAA-2022-1314; Project Identifier AD-2021-00811-E.
(a) Effective Date
This airworthiness directive (AD) is effective December 11,
2023.
(b) Affected ADs
This AD replaces AD 2018-03-13, Amendment 39-19186 (83 FR 6125,
February 13, 2018).
(c) Applicability
This AD applies to General Electric Company (GE) Model CT7-5A2,
CT7-5A3, CT7-7A, CT7-7A1, CT7-9B, CT7-9B1, CT7-9B2, CT7-9C, and CT7-
9C3 engines.
(d) Subject
Joint Aircraft System Component (JASC) Code 7210, Turbine Engine
Reduction Gear.
(e) Unsafe Condition
This AD was prompted by an in-flight failure of a main propeller
shaft on a GE Model CT7-9B model engine, resulting in the loss of
the propeller. The FAA is issuing this AD to prevent failure of the
main propeller shaft. The unsafe condition, if not addressed, could
cause in-flight loss of the propeller, loss of engine thrust
control, and damage to the airplane.
(f) Compliance
Comply with this AD within the compliance times specified,
unless already done.
(g) Required Actions
(1) For affected CT7-5A2, CT7-5A3, CT7-9B, CT7-9B1, and CT7-9B2
model engines, using the compliance times specified in Figure 1 to
paragraph (g)(1) of this AD, perform initial and repetitive visual
inspections, fluorescent penetrant inspections (FPIs), and
ultrasonic inspections (USIs) of the main propeller shaft.
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[[Page 76119]]
[GRAPHIC] [TIFF OMITTED] TR06NO23.056
(2) For affected CT7-7A, CT7-7A1, CT7-9C, and CT7-9C3 model
engines, using the compliance times specified in Figure 2 to
paragraph (g)(2) of this AD, perform initial and repetitive visual
inspections, FPIs, and USIs of the main propeller shaft.
[GRAPHIC] [TIFF OMITTED] TR06NO23.057
(3) Perform the visual inspections, FPIs, and USIs required by
paragraphs (g)(1) and (2) of this AD as follows:
(i) Prior to performance of the inspections, clean the main
propeller shaft flange using the Accomplishment Instructions,
paragraph 3.B., of GE Service Bulletin (SB) CT7-TP 72-0541 R01,
dated November 18, 2021 (GE SB CT7-TP 72-0541).
[[Page 76120]]
(ii) Visually inspect the main propeller shaft for wear,
corrosion, and cracking using the Accomplishment Instructions,
paragraph 3.C.(1), of GE SB CT7-TP 72-0541.
(iii) Spot-FPI the area on the main propeller shaft flange face
using the Accomplishment Instructions, paragraph 3.C.(2)(a), of GE
SB CT7-TP 72-0541.
(iv) USI the two dowel pin holes of the main propeller shaft
using the Accomplishment Instructions, paragraph 3.C.(3)(a), of GE
SB CT7-TP 72-0541.
(4) If a crack or rejectable indication is found during the
initial and repetitive visual inspections, FPIs, or USIs required by
paragraphs (g)(1) through (3) of this AD, before further flight,
remove the main propeller shaft from service and replace it with a
part eligible for installation.
(5) For all affected engines, if the main propeller shaft CSN is
unknown, use the propeller gearbox (PGB) CSN. If the PGB CSN is
unknown, assume the inspection threshold is exceeded.
(h) Optional Terminating Action
Accomplishing the actions in paragraphs (h)(1) through (4) of
this AD, as applicable by engine model, constitutes terminating
action for the inspections required by paragraphs (g)(1) through (3)
of this AD.
(1) For affected CT7-5A2, CT7-5A3, CT7-7A, and CT7-7A1 model
engines, revise the airworthiness limitations section (ALS) of the
existing maintenance manual (MM) and the operator's existing
approved maintenance program or inspection program, as applicable,
by incorporating the information in Figure 3 to paragraph (h)(1) of
this AD.
[GRAPHIC] [TIFF OMITTED] TR06NO23.058
(2) For affected CT7-9B, CT7-9B1, CT7-9B2, CT7-9C, and CT7-9C3
model engines, revise the ALS of the existing MM and the operator's
existing approved maintenance program or inspection program, as
applicable, by incorporating the information in Figure 4 to
paragraph (h)(2) of this AD.
[[Page 76121]]
[GRAPHIC] [TIFF OMITTED] TR06NO23.059
(3) Thereafter, except as provided in paragraph (k) of this AD,
no alternative inspection times or intervals may be approved for
this main propeller shaft.
(4) The optional terminating actions in paragraphs (h)(1) and
(2) of this AD may be performed by the owner/operator (pilot)
holding at least a private pilot certificate and must be entered
into the aircraft records showing compliance with this AD in
accordance with 14 CFR 43.9(a) and 91.417(a)(2)(v). The record must
be maintained as required by 14 CFR 91.417, 121.380, or 135.439.
(i) Definition
For the purpose of this AD, a ``part eligible for installation''
is a main propeller shaft that has been inspected in accordance with
paragraphs (g)(1) or (2), and (3) of this AD, and there was no crack
or rejectable indication.
(j) Credit for Previous Actions
You may take credit for the initial visual inspection, FPI, and
USI required by paragraphs (g)(1) through (3) of this AD if you
performed these initial inspections before the effective date of
this AD in accordance with GE SB CT7-TP 72-0541 R00, dated September
9, 2021.
(k) 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 (l) of this AD and email it 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.
(l) 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: [email protected].
[[Page 76122]]
(m) Material Incorporated by Reference
(1) The Director of the Federal Register approved the
incorporation by reference (IBR) 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) General Electric Company (GE) Service Bulletin CT7-TP 72-
0541 R01, dated November 18, 2021.
(ii) [Reserved]
(3) For GE service information identified in this AD, contact
General Electric Company, 1 Neumann Way, Cincinnati, OH 45215;
phone: (513) 552-3272; email: ge.com">aviation.fleetsupport@ae.ge.com;
website: ge.com.
(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 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 October 20, 2023.
Ross Landes,
Deputy Director for Regulatory Operations, Compliance & Airworthiness
Division, Aircraft Certification Service.
[FR Doc. 2023-24386 Filed 11-3-23; 8:45 am]
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