Airworthiness Directives; General Electric Company Turbofan Engines, 64375-64377 [2020-22505]
Download as PDF
<![CDATA[
64375
Rules and Regulations
Federal Register
Vol. 85, No. 198
Tuesday, October 13, 2020
This section of the FEDERAL REGISTER
contains regulatory documents having general
applicability and legal effect, most of which
are keyed to and codified in the Code of
Federal Regulations, which is published under
50 titles pursuant to 44 U.S.C. 1510.
The Code of Federal Regulations is sold by
the Superintendent of Documents.
DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 39
[Docket No. FAA–2020–0733; Project
Identifier AD–2020–00990–E; Amendment
39–21286; AD 2020–21–13]
RIN 2120–AA64
Airworthiness Directives; General
Electric Company Turbofan Engines
Federal Aviation
Administration (FAA), DOT.
ACTION: Final rule.
AGENCY:
The FAA is adopting a new
airworthiness directive (AD) for certain
General Electric Company (GE) GE90–
110B1 and GE90–115B model turbofan
engines. This AD was prompted by the
detection of melt-related freckles in the
billet, which may reduce the life limits
of certain high-pressure turbine (HPT)
rotor stage 2 disks and certain rotating
compressor discharge pressure (CDP)
HPT seals. This AD requires the
replacement of the affected HPT rotor
stage 2 disks and rotating CDP HPT
seals. The FAA is issuing this AD to
address the unsafe condition on these
products.
DATES: This AD is effective November
17, 2020.
ADDRESSES: For service information
identified in this final rule, contact
General Electric Company, 1 Neumann
Way, Cincinnati, OH 45215; phone:
SUMMARY:
(513) 552–3272; email:
aviation.fleetsupport@ae.ge.com;
website: www.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 781–238–7759.
It is also available on the internet at
https://www.regulations.gov by
searching for and locating Docket No.
FAA–2020–0733.
Examining the AD Docket
You may examine the AD docket on
the internet at https://
www.regulations.gov by searching for
and locating Docket No. FAA–2020–
0733; 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.
FOR FURTHER INFORMATION CONTACT:
Mehdi Lamnyi, Aerospace Engineer,
ECO Branch, FAA, 1200 District
Avenue, Burlington, MA 01803; phone:
781–238–7743; fax: 781–238–7199;
email: Mehdi.Lamnyi@faa.gov.
SUPPLEMENTARY INFORMATION:
Discussion
The FAA issued a notice of proposed
rulemaking (NPRM) to amend 14 CFR
part 39 by adding an AD that would
apply to certain GE GE90–110B1 and
GE90–115B model turbofan engines.
The NPRM published in the Federal
Register on August 13, 2020 (85 FR
49322). The NPRM was prompted by the
detection of melt-related freckles in the
billet, which may reduce the life limits
of certain HPT rotor stage 2 disks and
certain rotating CDP HPT seals. The
NPRM proposed to require the
replacement of certain HPT rotor stage
2 disks and certain rotating CDP HPT
seals. The FAA is issuing this AD to
address the unsafe condition on these
products.
Comments
The FAA gave the public the
opportunity to participate in developing
this final rule. The FAA has considered
the comments received. Boeing
Commercial Airplanes supported the
NPRM. The Air Line Pilots Association
and United Airlines reviewed the NPRM
and have no objections.
Conclusion
The FAA reviewed the relevant data,
considered the comments received, and
determined that air safety and the
public interest require adopting this
final rule as proposed.
Related Service Information
The FAA reviewed GE Service
Bulletin GE90–100 S/B 72–0845,
Revision 1, dated July 17, 2020. The
service information describes
procedures for the removal of affected
HPT rotor stage 2 disks and rotating
CDP HPT seals from service.
Interim Action
The FAA considers this AD an
interim action. This issue is still under
investigation by the manufacturer and,
depending on the results of that
investigation, the FAA may consider
further rulemaking action.
Costs of Compliance
The FAA estimates that this AD will
affect 1 engine installed on an airplane
of U.S. registry.
The FAA estimates the following
costs to comply with this AD:
khammond on DSKJM1Z7X2PROD with RULES
ESTIMATED COSTS
Cost on U.S.
operators
Labor cost
Remove and replace the HPT rotor stage 2
disk.
Remove and replace the rotating CDP HPT
Seal.
1,500 work-hours × $85 per hour = $127,500
$565,600
$693,100
$693,100
600 work-hours × $85 per hour = $51,000 ....
209,900
260,900
0
VerDate Sep<11>2014
15:52 Oct 09, 2020
Jkt 253001
PO 00000
Frm 00001
Fmt 4700
Sfmt 4700
Parts cost
Cost per
product
Action
E:\FR\FM\13OCR1.SGM
13OCR1
Federal Register / Vol. 85, No. 198 / Tuesday, October 13, 2020 / Rules and Regulations
khammond on DSKJM1Z7X2PROD with RULES
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.
(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.
§ 39.13
[Amended]
2. The FAA amends § 39.13 by adding
the following new airworthiness
directive (AD):
Regulatory Findings
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
■
(h) Definitions
transportation of the engine without
subsequent engine maintenance does not
constitute an engine shop visit.
(1) For the purpose of this AD, a part
eligible for installation is any HPT stage 2
disk or rotating CDP HPT seal with an S/N
that is not listed in Table 1.
(2) For the purpose of this AD, an engine
shop visit is the induction of an engine into
the shop for maintenance involving the
separation of pairs of major mating engine
flanges, except that the separation of engine
flanges solely for the purposes of
VerDate Sep<11>2014
19:50 Oct 09, 2020
Jkt 253001
2020–21–13 General Electric Company:
Amendment 39–21286; Docket No.
FAA–2020–0733; Project Identifier AD–
2020–00990–E.
(a) Effective Date
This AD is effective November 17, 2020.
(b) Affected ADs
None.
(c) Applicability
This AD applies to General Electric
Company GE90–110B1 and GE90–115B
model turbofan engines with:
(i) Alternative Methods of Compliance
(AMOCs)
(1) The Manager, ECO 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
PO 00000
Frm 00002
Fmt 4700
Sfmt 4700
(1) A high-pressure turbine (HPT) rotor
stage 2 disk, part number (P/N) 2505M73P03,
and serial number (S/N) TMT1BA38 or
TMT1BA41, installed; or
(2) A rotating compressor discharge
pressure (CDP) HPT seal, P/N 2479M03P01,
and S/N GEE1H7GH or GEE1H7JJ, installed.
(d) Subject
Joint Aircraft System Component (JASC)
Code 7250, Turbine Section.
(e) Unsafe Condition
This AD was prompted by the detection of
melt-related freckles in the billet, which may
reduce the life limits of certain HPT rotor
stage 2 disks and certain rotating CDP HPT
seals. The FAA is issuing this AD to prevent
uncontained release of both the HPT rotor
stage 2 disk and the rotating CDP HPT seal.
The unsafe condition, if not addressed, could
result in damage to the engine and damage
to the aircraft.
(f) Compliance
Comply with this AD within the
compliance times specified, unless already
done.
(g) Required Actions
(1) Before the affected HPT rotor stage 2
disk or the rotating CDP HPT seal listed in
Table 1 to paragraph (g) of this AD (‘‘Table
1’’) accumulates the cycles since new (CSN)
threshold in Table 1, or at the next engine
shop visit, whichever occurs first after the
effective date of this AD, remove the affected
part from service and replace it with a part
eligible for installation.
(2) If the affected HPT rotor stage 2 disk or
rotating CDP HPT seal has already exceeded
the CSN threshold in Table 1, remove the
affected part before further flight and replace
with a part eligible for installation.
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 (j) of this AD. You
may email your request to: ANE-AD-AMOC@
faa.gov.
(2) Before using any approved AMOC,
notify your appropriate principal inspector,
or lacking a principal inspector, the manager
E:\FR\FM\13OCR1.SGM
13OCR1
ER13OC20.005</GPH>
64376
Federal Register / Vol. 85, No. 198 / Tuesday, October 13, 2020 / Rules and Regulations
of the local flight standards district office/
certificate holding district office.
(j) Related Information
For more information about this AD,
contact Mehdi Lamnyi, Aerospace Engineer,
ECO Branch, FAA, 1200 District Avenue,
Burlington, MA 01803; phone: 781–238–
7743; fax: 781–238–7199; email:
Mehdi.Lamnyi@faa.gov.
(k) Material Incorporated by Reference
None.
Issued on October 6, 2020.
Lance T. Gant,
Director, Compliance & Airworthiness
Division, Aircraft Certification Service.
Background
[FR Doc. 2020–22505 Filed 10–9–20; 8:45 am]
BILLING CODE 4910–13–P
DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 71
[Docket No. FAA–2019–0815; Airspace
Docket No. 19–ASW–8]
RIN 2120–AA66
Revocation, Amendment, and
Establishment of Multiple Air Traffic
Service (ATS) Routes Due to the
Decommissioning of the Greene
County, MS, VOR
Federal Aviation
Administration (FAA), DOT.
ACTION: Final rule, delay of effective
date.
AGENCY:
This action changes the
effective date of a final rule published
in the Federal Register on August 20,
2020, removing Jet Route J–590,
amending VHF Omnidirectional Range
(VOR) Federal airways V–11 and V–70,
and establishing area navigation (RNAV)
routes T–362 and T–365 due to the
planned decommissioning of the VOR
portion of the Greene County, MS
(GCV), VOR/Tactical Air Navigation
(VORTAC) navigation aid (NAVAID).
The FAA is delaying the effective date
to coincide with the slipped
decommissioning date of the Greene
County VOR to June 17, 2021, and the
anticipated completion of flight
inspection activities associated with
related VOR Minimum Operational
Network (MON) Program projects
necessary to adopt the rule
amendments.
khammond on DSKJM1Z7X2PROD with RULES
SUMMARY:
The effective date of the final
rule published on August 20, 2020 (85
FR 51329) is delayed until June 17,
2021. The Director of the Federal
Register approved this incorporation by
reference action under Title 1 Code of
DATES:
VerDate Sep<11>2014
15:52 Oct 09, 2020
Jkt 253001
Federal Regulations part 51, subject to
the annual revision of FAA Order
7400.11 and publication of conforming
amendments.
FOR FURTHER INFORMATION CONTACT:
Colby Abbott, Rules and Regulations
Group, Office of Policy, Federal
Aviation Administration, 800
Independence Avenue SW, Washington,
DC 20591; telephone: (202) 267–8783.
SUPPLEMENTARY INFORMATION:
The FAA published a final rule in the
Federal Register for Docket No. FAA–
2019–0815 (85 FR 51329, August 20,
2020), removing Jet Route J–590,
amending VOR Federal airways V–11
and V–70, and establishing RNAV
routes T–362 and T–365 due to the
planned decommissioning of the VOR
portion of the Greene County, MS,
VORTAC NAVAID. The effective date
for that final rule is November 5, 2020.
Subsequent to the final rule, the
required flight inspection activities for
related VOR MON projects supporting
the Greene County VOR
decommissioning were not able to be
accomplished in time due to NAVAID
outages associated with the related VOR
MON projects. The FAA anticipates the
NAVAID outages will be resolved and
the required flight inspection activities
accomplished by June 17, 2021.
To facilitate the safe and continuous
use of existing air traffic procedures,
and in anticipation the NAVAID outages
will be resolved and the required flight
inspection activities for the related VOR
MON projects accomplished, the
planned decommissioning date for the
Greene County, MS, VOR has been
slipped to June 17, 2021. Therefore, the
rule removing J–590, amending V–11
and V–70, and establishing T–362 and
T–365 is delayed to coincide with that
date.
Jet routes are published in paragraph
2004, VOR Federal airways are
published in paragraph 6010(a), and
RNAV T-routes are published in
paragraph 6011 of FAA Order 7400.11E
dated July 21, 2020, and effective
September 15, 2020, which is
incorporated by reference in 14 CFR
71.1. The ATS routes listed in this
document will be subsequently
published in the Order.
FAA Order 7400.11, Airspace
Designations and Reporting Points, is
published yearly and effective on
September 15.
Good Cause for No Notice and
Comment
Section 553(b)(3)(B) of Title 5, United
States Code, (the Administrative
PO 00000
Frm 00003
Fmt 4700
Sfmt 4700
64377
Procedure Act) authorizes agencies to
dispense with notice and comment
procedures for rules when the agency
for ‘‘good cause’’ finds that those
procedures are ‘‘impracticable,
unnecessary, or contrary to the public
interest.’’ Under this section, an agency,
upon finding good cause, may issue a
final rule without seeking comment
prior to the rulemaking. The FAA finds
that prior notice and public comment to
this final rule is unnecessary due to the
brief length of the extension of the
effective date and the fact that there is
no substantive change to the rule.’’
Delay of Effective Date
Accordingly, pursuant to the authority
delegated to me, the effective date of the
final rule, Airspace Docket 19–ASW–8,
as published in the Federal Register on
August 20, 2020 (85 FR 51329), FR Doc.
2020–18253, is hereby delayed until
June 17, 2021.
■
Authority: 49 U.S.C. 106(f), 106(g); 40103,
40113, 40120; E.O. 10854, 24 FR 9565, 3 CFR,
1959–1963 Comp., P. 389.
Issued in Washington, DC, on October 6,
2020.
Scott M. Rosenbloom,
Acting Manager, Rules and Regulations
Group.
[FR Doc. 2020–22426 Filed 10–9–20; 8:45 am]
BILLING CODE 4910–13–P
DEPARTMENT OF COMMERCE
Bureau of Industry and Security
15 CFR Part 705
[Docket No. 201006–0266]
RIN 0694–AI26
Procedures To Grant Relief From the
Quantitative Limitation Applicable to
Certain Steel Articles for Brazil for
Parties With Preexisting Contracts
That Meet Specified Criteria
Bureau of Industry and
Security, U.S. Department of Commerce.
ACTION: Temporary final rule.
AGENCY:
This temporary final rule
establishes procedures to grant relief
from the quantitative limitation
applicable to certain steel articles for
Brazil for parties with preexisting
contracts that meet specified criteria as
authorized by the President as part of
the action he took to adjust imports
under Section 232 of the Trade
Expansion Act of 1962, as amended
(‘‘section 232’’).
DATES: Effective date: This temporary
final rule is effective October 13, 2020,
through December 31, 2020.
SUMMARY:
E:\FR\FM\13OCR1.SGM
13OCR1
]]>Agencies
[Federal Register Volume 85, Number 198 (Tuesday, October 13, 2020)]
[Rules and Regulations]
[Pages 64375-64377]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 2020-22505]
========================================================================
Rules and Regulations
Federal Register
________________________________________________________________________
This section of the FEDERAL REGISTER contains regulatory documents
having general applicability and legal effect, most of which are keyed
to and codified in the Code of Federal Regulations, which is published
under 50 titles pursuant to 44 U.S.C. 1510.
The Code of Federal Regulations is sold by the Superintendent of Documents.
========================================================================
Federal Register / Vol. 85, No. 198 / Tuesday, October 13, 2020 /
Rules and Regulations
[[Page 64375]]
DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 39
[Docket No. FAA-2020-0733; Project Identifier AD-2020-00990-E;
Amendment 39-21286; AD 2020-21-13]
RIN 2120-AA64
Airworthiness Directives; General Electric Company Turbofan
Engines
AGENCY: Federal Aviation Administration (FAA), DOT.
ACTION: Final rule.
-----------------------------------------------------------------------
SUMMARY: The FAA is adopting a new airworthiness directive (AD) for
certain General Electric Company (GE) GE90-110B1 and GE90-115B model
turbofan engines. This AD was prompted by the detection of melt-related
freckles in the billet, which may reduce the life limits of certain
high-pressure turbine (HPT) rotor stage 2 disks and certain rotating
compressor discharge pressure (CDP) HPT seals. This AD requires the
replacement of the affected HPT rotor stage 2 disks and rotating CDP
HPT seals. The FAA is issuing this AD to address the unsafe condition
on these products.
DATES: This AD is effective November 17, 2020.
ADDRESSES: For service information identified in this final rule,
contact General Electric Company, 1 Neumann Way, Cincinnati, OH 45215;
phone: (513) 552-3272; email: [email protected]; website:
www.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 781-238-7759. It is also
available on the internet at https://www.regulations.gov by searching
for and locating Docket No. FAA-2020-0733.
Examining the AD Docket
You may examine the AD docket on the internet at https://www.regulations.gov by searching for and locating Docket No. FAA-2020-
0733; 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.
FOR FURTHER INFORMATION CONTACT: Mehdi Lamnyi, Aerospace Engineer, ECO
Branch, FAA, 1200 District Avenue, Burlington, MA 01803; phone: 781-
238-7743; fax: 781-238-7199; email: [email protected].
SUPPLEMENTARY INFORMATION:
Discussion
The FAA issued a notice of proposed rulemaking (NPRM) to amend 14
CFR part 39 by adding an AD that would apply to certain GE GE90-110B1
and GE90-115B model turbofan engines. The NPRM published in the Federal
Register on August 13, 2020 (85 FR 49322). The NPRM was prompted by the
detection of melt-related freckles in the billet, which may reduce the
life limits of certain HPT rotor stage 2 disks and certain rotating CDP
HPT seals. The NPRM proposed to require the replacement of certain HPT
rotor stage 2 disks and certain rotating CDP HPT seals. The FAA is
issuing this AD to address the unsafe condition on these products.
Comments
The FAA gave the public the opportunity to participate in
developing this final rule. The FAA has considered the comments
received. Boeing Commercial Airplanes supported the NPRM. The Air Line
Pilots Association and United Airlines reviewed the NPRM and have no
objections.
Conclusion
The FAA reviewed the relevant data, considered the comments
received, and determined that air safety and the public interest
require adopting this final rule as proposed.
Related Service Information
The FAA reviewed GE Service Bulletin GE90-100 S/B 72-0845, Revision
1, dated July 17, 2020. The service information describes procedures
for the removal of affected HPT rotor stage 2 disks and rotating CDP
HPT seals from service.
Interim Action
The FAA considers this AD an interim action. This issue is still
under investigation by the manufacturer and, depending on the results
of that investigation, the FAA may consider further rulemaking action.
Costs of Compliance
The FAA estimates that this AD will affect 1 engine installed on an
airplane 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
----------------------------------------------------------------------------------------------------------------
Remove and replace the HPT rotor stage 1,500 work-hours x $85 $565,600 $693,100 $693,100
2 disk. per hour = $127,500.
Remove and replace the rotating CDP 600 work-hours x $85 per 209,900 260,900 0
HPT Seal. hour = $51,000.
----------------------------------------------------------------------------------------------------------------
[[Page 64376]]
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
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 adding the following new airworthiness
directive (AD):
2020-21-13 General Electric Company: Amendment 39-21286; Docket No.
FAA-2020-0733; Project Identifier AD-2020-00990-E.
(a) Effective Date
This AD is effective November 17, 2020.
(b) Affected ADs
None.
(c) Applicability
This AD applies to General Electric Company GE90-110B1 and GE90-
115B model turbofan engines with:
(1) A high-pressure turbine (HPT) rotor stage 2 disk, part
number (P/N) 2505M73P03, and serial number (S/N) TMT1BA38 or
TMT1BA41, installed; or
(2) A rotating compressor discharge pressure (CDP) HPT seal, P/N
2479M03P01, and S/N GEE1H7GH or GEE1H7JJ, installed.
(d) Subject
Joint Aircraft System Component (JASC) Code 7250, Turbine
Section.
(e) Unsafe Condition
This AD was prompted by the detection of melt-related freckles
in the billet, which may reduce the life limits of certain HPT rotor
stage 2 disks and certain rotating CDP HPT seals. The FAA is issuing
this AD to prevent uncontained release of both the HPT rotor stage 2
disk and the rotating CDP HPT seal. The unsafe condition, if not
addressed, could result in damage to the engine and damage to the
aircraft.
(f) Compliance
Comply with this AD within the compliance times specified,
unless already done.
(g) Required Actions
(1) Before the affected HPT rotor stage 2 disk or the rotating
CDP HPT seal listed in Table 1 to paragraph (g) of this AD (``Table
1'') accumulates the cycles since new (CSN) threshold in Table 1, or
at the next engine shop visit, whichever occurs first after the
effective date of this AD, remove the affected part from service and
replace it with a part eligible for installation.
(2) If the affected HPT rotor stage 2 disk or rotating CDP HPT
seal has already exceeded the CSN threshold in Table 1, remove the
affected part before further flight and replace with a part eligible
for installation.
[GRAPHIC] [TIFF OMITTED] TR13OC20.005
(h) Definitions
(1) For the purpose of this AD, a part eligible for installation
is any HPT stage 2 disk or rotating CDP HPT seal with an S/N that is
not listed in Table 1.
(2) For the purpose of this AD, an engine shop visit is the
induction of an engine into the shop for maintenance involving the
separation of pairs of major mating engine flanges, except that the
separation of engine flanges solely for the purposes of
transportation of the engine without subsequent engine maintenance
does not constitute an engine shop visit.
(i) Alternative Methods of Compliance (AMOCs)
(1) The Manager, ECO 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
certification office, send it to the attention of the person
identified in paragraph (j) of this AD. You may email your request
to: [email protected].
(2) Before using any approved AMOC, notify your appropriate
principal inspector, or lacking a principal inspector, the manager
[[Page 64377]]
of the local flight standards district office/certificate holding
district office.
(j) Related Information
For more information about this AD, contact Mehdi Lamnyi,
Aerospace Engineer, ECO Branch, FAA, 1200 District Avenue,
Burlington, MA 01803; phone: 781-238-7743; fax: 781-238-7199; email:
[email protected].
(k) Material Incorporated by Reference
None.
Issued on October 6, 2020.
Lance T. Gant,
Director, Compliance & Airworthiness Division, Aircraft Certification
Service.
[FR Doc. 2020-22505 Filed 10-9-20; 8:45 am]
BILLING CODE 4910-13-P
