Rule2021-19600
Airworthiness Directives; International Aero Engines, LLC Turbofan Engines
Primary source
Metadata and text below are from the Federal Register, a public-domain U.S. government work. Always verify the official published version before relying on it for any legal matter.
Published
September 10, 2021
Effective
September 27, 2021
Issuing agencies
Transportation DepartmentFederal Aviation Administration
Abstract
The FAA is adopting a new airworthiness directive (AD) for certain International Aero Engines, LLC (IAE) PW1122G-JM, PW1124G1-JM, PW1124G-JM, PW1127G1-JM, PW1127GA-JM, PW1127G-JM, PW1129G-JM, PW1130G- JM, PW1133GA-JM, and PW1133G-JM model turbofan engines. This AD was prompted by a root cause analysis of an event involving an uncontained failure of a high-pressure turbine (HPT) disk that resulted in high- energy debris penetrating the engine cowling on an Airbus Model A321- 231 airplane, powered by IAE V2533-A5 model turbofan engines. This AD requires removing certain HPT 1st-stage and HPT 2nd-stage disks from service. The FAA is issuing this AD to address the unsafe condition on these products.
Full Text
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<title>Federal Register, Volume 86 Issue 173 (Friday, September 10, 2021)</title>
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[Federal Register Volume 86, Number 173 (Friday, September 10, 2021)]
[Rules and Regulations]
[Pages 50610-50614]
From the Federal Register Online via the Government Publishing Office [<a href="http://www.gpo.gov">www.gpo.gov</a>]
[FR Doc No: 2021-19600]
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DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 39
[Docket No. FAA-2021-0780; Project Identifier AD-2021-00916-E;
Amendment 39-21728; AD 2021-19-10]
RIN 2120-AA64
Airworthiness Directives; International Aero Engines, LLC
Turbofan Engines
AGENCY: Federal Aviation Administration (FAA), DOT.
ACTION: Final rule; request for comments.
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SUMMARY: The FAA is adopting a new airworthiness directive (AD) for
certain International Aero Engines, LLC (IAE) PW1122G-JM, PW1124G1-JM,
PW1124G-JM, PW1127G1-JM, PW1127GA-JM, PW1127G-JM, PW1129G-JM, PW1130G-
JM, PW1133GA-JM, and PW1133G-JM model turbofan engines. This AD was
prompted by a root cause analysis of an event involving an uncontained
failure of a high-pressure turbine (HPT) disk that resulted in high-
energy debris penetrating the engine cowling on an Airbus Model A321-
231 airplane, powered by IAE V2533-A5 model turbofan engines. This AD
requires removing certain HPT 1st-stage and HPT 2nd-stage disks from
service. The FAA is issuing this AD to address the unsafe condition on
these products.
DATES: This AD is effective September 27, 2021.
The FAA must receive comments on this AD by October 25, 2021.
ADDRESSES: You may send comments, using the procedures found in 14 CFR
11.43 and 11.45, by any of the following methods:
<bullet> Federal eRulemaking Portal: Go to <a href="https://www.regulations.gov">https://www.regulations.gov</a>. Follow the instructions for submitting comments.
<bullet> Fax: (202) 493-2251.
<bullet> Mail: U.S. Department of Transportation, Docket
Operations, M-30, West Building Ground Floor, Room W12-140, 1200 New
Jersey Avenue SE, Washington, DC 20590.
<bullet> Hand Delivery: Deliver to Mail address above between 9
a.m. and 5 p.m., Monday through Friday, except Federal holidays.
Examining the AD Docket
You may examine the AD docket at <a href="https://www.regulations.gov">https://www.regulations.gov</a> by
searching for and locating Docket No. FAA-2021-0780; 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 street address for the
Docket Operations is listed above.
FOR FURTHER INFORMATION CONTACT: Mark Taylor, Aviation Safety Engineer,
ECO Branch, FAA, 1200 District Avenue, Burlington, MA 01803; phone:
(781) 238-7229; fax: (781) 238-7199; email: <a href="/cdn-cgi/l/email-protection#eca18d9e87c2b88d9580839eac8a8d8dc28b839a"><span class="__cf_email__" data-cfemail="521f3320397c06332b3e3d20123433337c353d24">[email protected]</span></a>.
SUPPLEMENTARY INFORMATION:
Background
On March 18, 2020, an Airbus Model A321-231 airplane, powered by
IAE V2533-A5 model turbofan engines, experienced an uncontained HPT
1st-stage disk failure that resulted in high-energy debris penetrating
the engine cowling. Based on a preliminary analysis of this event, on
March 21, 2020, the FAA issued Emergency AD 2020-07-51 (followed by
publication in the Federal Register on April 13, 2020, as a Final Rule,
Request for Comments (85 FR 20402)), which requires the removal from
service of certain HPT 1st-stage disks installed on IAE V2522-A5,
V2524-A5, V2525-D5, V2527-A5, V2527E-A5, V2527M-A5, V2528-D5, V2530-A5,
and V2533-A5 model turbofan engines.
Pratt & Whitney (PW) determined that the failure of the V2533-A5
model turbofan engine was due to an undetected subsurface material
defect in an HPT disk that may affect the life of the part. In June
2021, PW expanded its root cause analysis to include a review of
records for all other IAE and PW engines that contain parts of similar
material.
On July 29, 2021, PW provided its PW1100G analysis results to the
FAA. PW's analysis identified a different population of HPT 1st-stage
and HPT 2nd-stage disks installed on IAE PW1122G-JM, PW1124G1-JM,
PW1124G-JM, PW1127G1-JM, PW1127GA-JM, PW1127G-JM, PW1129G-JM, PW1130G-
JM, PW1133GA-JM, and PW1133G-JM model turbofan engines that are also
affected by the unsafe condition in AD 2020-07-51 and require removal
from service. This condition, if not addressed, could result in
uncontained HPT disk failure, release of high-energy debris, damage to
the engine, damage to the airplane, and loss of the airplane. The FAA
is issuing this AD to address the unsafe condition on these products.
FAA's Determination
The FAA is issuing this AD because the agency has determined the
unsafe condition described previously is likely to exist or develop in
other products of the same type design.
[[Page 50611]]
AD Requirements
This AD requires the removal from service of certain HPT 1st-stage
and HPT 2nd-stage disks installed on PW1122G-JM, PW1124G1-JM, PW1124G-
JM, PW1127G1-JM, PW1127GA-JM, PW1127G-JM, PW1129G-JM, PW1130G-JM,
PW1133GA-JM, and PW1133G-JM model turbofan engines.
Justification for Immediate Adoption and Determination of the Effective
Date
Section 553(b)(3)(B) of the Administrative Procedure Act (APA) (5
U.S.C. 551 et seq.) 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 providing notice and seeking
comment prior to issuance. Further, section 553(d) of the APA
authorizes agencies to make rules effective in less than thirty days,
upon a finding of good cause.
An unsafe condition exists that requires the immediate adoption of
this AD without providing an opportunity for public comments prior to
adoption. The FAA has found that the risk to the flying public
justifies foregoing notice and comment prior to adoption of this rule.
PW determined that the failure of the V2533-A5 model turbofan engine
was due to an undetected subsurface material defect in an HPT disk that
may affect the life of the part. Based on the follow-on analysis
performed since that event, PW has identified a different population of
affected HPT 1st-stage and HPT 2nd-stage disks installed on IAE
PW1122G-JM, PW1124G1-JM, PW1124G-JM, PW1127G1-JM, PW1127GA-JM, PW1127G-
JM, PW1129G-JM, PW1130G-JM, PW1133GA-JM, and PW1133G-JM model turbofan
engines that are affected by the same unsafe condition as contained in
AD 2020-07-51 and require removal from service. These HPT disks have
the highest risk of failure and require removal within 30 days after
the effective date of this AD to prevent additional HPT disk failures
and maintain an acceptable level of safety. This unsafe condition may
result in loss of the airplane. The FAA considers removal of certain
HPT 1st-stage and HPT 2nd-stage disks to be an urgent safety issue.
Accordingly, notice and opportunity for prior public comment are
impracticable and contrary to the public interest pursuant to 5 U.S.C.
553(b)(3)(B).
In addition, the FAA finds that good cause exists pursuant to 5
U.S.C. 553(d) for making this amendment effective in less than 30 days,
for the same reasons the FAA found good cause to forego notice and
comment.
Comments Invited
The FAA invites you to send any written data, views, or arguments
about this final rule. Send your comments to an address listed under
ADDRESSES. Include ``Docket No. FAA-2021-0780 and Project Identifier
AD-2021-00916-E'' at the beginning of your comments. The most helpful
comments reference a specific portion of the final rule, 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
this final rule because of those comments.
Except for Confidential Business Information (CBI) as described in
the following paragraph, and other information as described in 14 CFR
11.35, the FAA will post all comments received, without change, to
<a href="https://www.regulations.gov">https://www.regulations.gov</a>, including any personal information you
provide. The agency will also post a report summarizing each
substantive verbal contact received about this final rule.
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 AD 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 AD, 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 AD. Submissions containing CBI should be sent to Mark
Taylor, Aviation Safety Engineer, ECO Branch, FAA, 1200 District
Avenue, Burlington, MA 01803. Any commentary that the FAA receives
which is not specifically designated as CBI will be placed in the
public docket for this rulemaking.
Regulatory Flexibility Act
The requirements of the Regulatory Flexibility Act (RFA) do not
apply when an agency finds good cause pursuant to 5 U.S.C. 553 to adopt
a rule without prior notice and comment. Because FAA has determined
that it has good cause to adopt this rule without prior notice and
comment, RFA analysis is not required.
Costs of Compliance
The FAA estimates that this AD affects 3 engines installed on
airplanes of U.S. registry.
The FAA estimates the following costs to comply with this AD:
Estimated Costs
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Cost per Cost on U.S.
Action Labor cost Parts cost product operators
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Remove HPT 1st-stage or HPT 2nd-stage 94 work-hours x $85 per $171,430 $179,420 $538,260
disk. hour = $7,990.
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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
This AD will not have federalism implications under Executive Order
[[Page 50612]]
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, and
(2) Will not affect intrastate aviation in Alaska.
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:
2021-19-10 International Aero Engines, LLC: Amendment 39-21728;
Docket No. FAA-2021-0780; Project Identifier AD-2021-00916-E.
(a) Effective Date
This airworthiness directive (AD) is effective September 27,
2021.
(b) Affected ADs
None.
(c) Applicability
This AD applies to International Aero Engines, LLC (IAE)
PW1122G-JM, PW1124G1-JM, PW1124G-JM, PW1127G1-JM, PW1127GA-JM,
PW1127G-JM, PW1129G-JM, PW1130G-JM, PW1133GA-JM, and PW1133G-JM
model turbofan engines with an installed:
(1) High-pressure turbine (HPT) 1st-stage disk, part number (P/
N) 30G6201 or 30G7301, with a serial number (S/N) listed in Figure 1
to paragraph (c) of this AD; or
(2) HPT 2nd-stage disk, P/N 30G5502 or 30G6602, with an S/N
listed in Figure 2 to paragraph (c) of this AD.
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(d) Subject
Joint Aircraft System Component (JASC) Code 7250, Turbine
Section.
(e) Unsafe Condition
This AD was prompted by an analysis performed by Pratt & Whitney
of an event involving an uncontained failure of an HPT 1st-stage
disk that resulted in high-energy debris penetrating the engine
cowling. The FAA is issuing this AD to prevent failure of the HPT
1st-stage and HPT 2nd-stage disks. The unsafe condition, if not
addressed, could result in uncontained HPT disk failure, release of
high-energy debris, damage to the engine, damage to the airplane,
and loss of the airplane.
(f) Compliance
Comply with this AD within the compliance times specified,
unless already done.
(g) Required Actions
(1) For IAE model turbofan engines with an HPT 1st-stage disk,
P/N 30G6201 or 30G7301, with an S/N listed in Figure 1 to paragraph
(c) of this AD, within 30 days after the effective days of the AD,
remove the HPT 1st-stage disk from service.
(2) For IAE model turbofan engines with an HPT 2nd-stage disk,
P/N 30G5502 or 30G6602, with an S/N listed in Figure 2 to paragraph
(c) of this AD, within 30 days after the effective days of the AD,
remove the HPT 2nd-stage disk from service.
(h) 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 (i) of this AD. Information may be emailed
to: <a href="/cdn-cgi/l/email-protection#febfb0bbd3bfbad3bfb3b1bdbe989f9fd0999188"><span class="__cf_email__" data-cfemail="80c1cec5adc1c4adc1cdcfc3c0e6e1e1aee7eff6">[email protected]</span></a>.
(2) Before using any approved AMOC, notify your appropriate
principal inspector, or lacking a principal inspector, the manager
of the local flight standards district office/certificate holding
district office.
(i) Related Information
For more information about this AD, contact Mark Taylor,
Aviation Safety Engineer, ECO Branch, FAA, 1200 District Avenue,
Burlington, MA 01803; phone: (781) 238-7229; fax: (781) 238-7199;
email: <a href="/cdn-cgi/l/email-protection#aee3cfdcc580facfd7c2c1dceec8cfcf80c9c1d8"><span class="__cf_email__" data-cfemail="8ec3effce5a0daeff7e2e1fccee8efefa0e9e1f8">[email protected]</span></a>.
(j) Material Incorporated by Reference
None.
Issued on September 7, 2021.
Lance T. Gant,
Director, Compliance & Airworthiness Division, Aircraft Certification
Service.
[FR Doc. 2021-19600 Filed 9-8-21; 11:15 am]
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