Rule2024-03442
Airworthiness Directives; Pratt & Whitney Canada Corp. 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
February 21, 2024
Effective
March 27, 2024
Issuing agencies
Transportation DepartmentFederal Aviation Administration
Abstract
The FAA is adopting a new airworthiness directive (AD) for all Pratt & Whitney Canada Corp. (P&WC) Model PW307A and PW307D engines. This AD is prompted by a root cause analysis of an event involving an uncontained failure of a high-pressure turbine (HPT) 1st-stage disk that resulted in high-energy debris penetrating the engine cowling and an aborted takeoff. This AD requires removing from service and replacing certain HPT disks and also prohibits installing certain HPT disks on any engine, as specified in a Transport Canada AD, which is incorporated by reference. The FAA is issuing this AD to address the unsafe condition on these products.
Full Text
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<title>Federal Register, Volume 89 Issue 35 (Wednesday, February 21, 2024)</title>
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[Federal Register Volume 89, Number 35 (Wednesday, February 21, 2024)]
[Rules and Regulations]
[Pages 12951-12953]
From the Federal Register Online via the Government Publishing Office [<a href="http://www.gpo.gov">www.gpo.gov</a>]
[FR Doc No: 2024-03442]
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DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 39
[Docket No. FAA-2023-2147; Project Identifier MCAI-2023-00663-E;
Amendment 39-22670; AD 2024-03-01]
RIN 2120-AA64
Airworthiness Directives; Pratt & Whitney Canada Corp. Engines
AGENCY: Federal Aviation Administration (FAA), DOT.
ACTION: Final rule.
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SUMMARY: The FAA is adopting a new airworthiness directive (AD) for all
Pratt & Whitney Canada Corp. (P&WC) Model PW307A and PW307D engines.
This AD is prompted by a root cause analysis of an event involving an
uncontained failure of a high-pressure turbine (HPT) 1st-stage disk
that resulted in high-energy debris penetrating the engine cowling and
an aborted takeoff. This AD requires removing from service and
replacing certain HPT disks and also prohibits installing certain HPT
disks on any engine, as specified in a Transport Canada AD, which is
incorporated by reference. The FAA is issuing this AD to address the
unsafe condition on these products.
DATES: This AD is effective March 27, 2024.
The Director of the Federal Register approved the incorporation by
reference of a certain publication listed in this AD as of March 27,
2024.
ADDRESSES:
AD Docket: You may examine the AD docket at <a href="http://regulations.gov">regulations.gov</a> under
Docket No. FAA-2023-2147; 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, the mandatory continuing airworthiness
information (MCAI), 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:
<bullet> For service information identified in this final rule,
contact Transport Canada, Transport Canada National Aircraft
Certification, 159 Cleopatra Drive, Nepean, Ontario, K1A 0N5, Canada;
phone: (888) 663-3639; email: <a href="/cdn-cgi/l/email-protection#1e4a5d305f776c69716c6a7677707b6d6d5a776c7b7d6a77687b6d335d71706d7779707b6d7a7b707f6877797f7c7772776a7b304a5d5e6a7d30797d307d7f"><span class="__cf_email__" data-cfemail="c09483ee81a9b2b7afb2b4a8a9aea5b3b384a9b2a5a3b4a9b6a5b3ed83afaeb3a9a7aea5b3a4a5aea1b6a9a7a1a2a9aca9b4a5ee948380b4a3eea7a3eea3a1">[email protected]</span></a>; website: tc.canada.ca/en/aviation.
<bullet> You may view this service information at the FAA,
Airworthiness Products Section, Operational Safety Branch, 1200
District Avenue, Burlington, MA 01803. For information on the
availability of this material at the FAA, call (817) 222-5110. It is
also available at <a href="http://regulations.gov">regulations.gov</a> under Docket No. FAA-2023-2147.
FOR FURTHER INFORMATION CONTACT: Barbara Caufield, Aviation Safety
Engineer, FAA, 1600 Stewart Avenue, Suite 410, Westbury, NY 11590;
phone: (781) 238-7146; email: <a href="/cdn-cgi/l/email-protection#73111201111201125d101206151a161f17331512125d141c05"><span class="__cf_email__" data-cfemail="32505340505340531c515347545b575e56725453531c555d44">[email protected]</span></a>.
SUPPLEMENTARY INFORMATION:
Background
The FAA issued a notice of proposed rulemaking (NPRM) to amend 14
CFR part 39 by adding an AD that would apply to all P&WC Model PW307A
and PW307D engines. The NPRM published in the Federal Register on
November 9, 2023 (88 FR 77236). The NPRM was prompted by AD CF-2023-30,
dated May 8, 2023 (Transport Canada AD CF-2023-30) (also referred to as
the MCAI), issued by Transport Canada, which is the aviation authority
for Canada. The MCAI states that on March 18, 2020, an Airbus Model
A321-231 airplane, powered by International Aero Engines AG (IAE) Model
V2533-A5 engines, experienced an uncontained HPT 1st-stage disk failure
that resulted in an aborted takeoff and high-energy debris penetrating
the engine cowling.
In response to the March 2020 uncontained HPT 1st-stage disk
failure, the FAA issued a series of ADs, including Emergency AD 2020-
07-51, Amendment 39-21110 (85 FR 20402, April 13, 2020) (AD 2020-07-
51). Since the FAA issued AD 2020-07-51, IAE determined that the
failure of the V2533-A5 engine was due to an undetected subsurface
material defect in the HPT 1st-stage disk that may affect the life of
the part. In coordination with IAE, P&WC performed a records review and
analysis of PW307A and PW307D engine parts made of similar material and
identified additional affected HPT 1st and 2nd-stage disks, installed
on PW307A and PW307D engines. These additional HPT disks may have a
material defect that could reduce the life of the part and must be
removed from service.
In the NPRM, the FAA proposed to require replacing certain HPT
disks and prohibiting the installation of certain HPT disks on any
engine, as specified in the MCAI. The FAA is issuing this AD to address
the unsafe condition on these products.
You may examine the MCAI in the AD docket at <a href="http://regulations.gov">regulations.gov</a> under
Docket No. FAA-2023-2147.
Discussion of Final Airworthiness Directive
Comments
The FAA received no comments on the NPRM or on the determination of
the costs.
Conclusion
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 reviewed the relevant data and
determined that air safety requires adopting this AD as proposed.
Accordingly, the FAA is issuing this AD to address the unsafe condition
on these products. Except for minor editorial changes, this AD is
adopted as proposed in the NPRM.
Related Service Information Under 1 CFR Part 51
The FAA reviewed Transport Canada AD CF-2023-30, which identifies
the affected HPT disks and specifies procedures for replacement. 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 ADDRESSES.
Costs of Compliance
The FAA estimates that this AD affects 63 engines installed on
airplanes of U.S. registry.
The FAA estimates the following costs to comply with this AD:
[[Page 12952]]
Estimated Costs
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Cost on
Action Labor cost Parts cost Cost per U.S.
product operators
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Remove affected HPT 1st or 2nd stage 8 work-hours x $85 per hour = $136,400 $137,080 $8,636,040
disk. $680.
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The FAA has included all known costs in its cost estimate.
According to the manufacturer, however, some of the costs of this AD
may be covered under warranty, thereby reducing the cost impact on
affected operators.
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:
2024-03-01 Pratt & Whitney Canada Corp.: Amendment 39-22670; Docket
No. FAA-2023-2147; Project Identifier MCAI-2023-00663-E.
(a) Effective Date
This airworthiness directive (AD) is effective March 27, 2024.
(b) Affected ADs
None.
(c) Applicability
This AD applies to Pratt & Whitney Canada Corp. Model PW307A and
PW307D engines.
(d) Subject
Joint Aircraft System Component (JASC) Code 7250, Turbine
Section.
(e) Unsafe Condition
This AD was prompted by a root cause analysis of an event
involving an International Aero Engines AG Model V2533-A5 engine,
which experienced an uncontained failure of a high-pressure turbine
(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 and 2nd-stage disks. The unsafe condition, if not
addressed, could result in uncontained HPT disk failure, 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
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, Transport Canada AD CF-2023-30, dated
May 8, 2023 (Transport Canada AD CF-2023-30).
(h) Exceptions To Transport Canada AD CF-2023-30
(1) Where Transport Canada AD CF-2023-30 requires compliance
from its effective date, this AD requires using the effective date
of this AD.
(2) Where paragraph A. of Transport Canada AD CF-2023-30
specifies ``Before 31 January 2027,'' replace that text with
``Within 36 months after the effective date of this AD.''
(3) Where paragraph B. of Transport Canada AD CF-2023-30
specifies ``At the next opportunity, when the affected engine is
disassembled and access is available to the HPT disk, remove any
affected HPT disk listed in Table 2 or Table 4 below and replace the
affected HPT disk with a serviceable part,'' replace that text with
``For any engine with an installed HPT disk listed in Table 2 or
Table 4 [of Transport Canada AD CF-2023-30], at the next piece-part
exposure, remove the affected HPT disk from service and replace with
a serviceable part.''
(i) No Reporting Requirement
Although the service information referenced in Transport Canada
AD CF-2023-30 specifies to submit certain information to the
manufacturer, this AD does not include that requirement.
(j) Definitions
(1) For the purpose of this AD, ``piece-part exposure'' is when
the affected part is removed from the engine and completely
disassembled.
(2) For the purpose of this AD, a ``serviceable part'' is any
HPT disk that is not identified in Tables 1 through 4 of Transport
Canada AD CF-2023-30.
(k) Alternative Methods of Compliance (AMOCs)
(1) The Manager, International Validation 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 International Validation Branch, send
it to the attention of the person identified in paragraph (l) of
this AD and email to: <a href="/cdn-cgi/l/email-protection#2c6d6269016d68016d61636f6c4a4d4d024b435a"><span class="__cf_email__" data-cfemail="25646b600864610864686a66654344440b424a53">[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.
(l) Additional Information
For more information about this AD, contact Barbara Caufield,
Aviation Safety Engineer, FAA, 1600 Stewart Avenue, Suite
[[Page 12953]]
410, Westbury, NY 11590; phone: (781) 238-7146; email:
<a href="/cdn-cgi/l/email-protection#45272437272437246b262430232c202921052324246b222a33"><span class="__cf_email__" data-cfemail="5f3d3e2d3d3e2d3e713c3e2a39363a333b1f393e3e71383029">[email protected]</span></a>.
(m) Material Incorporated by Reference
(1) The Director of the Federal Register approved the
incorporation by reference of the service information listed in this
paragraph under 5 U.S.C. 552(a) and 1 CFR part 51.
(2) You must use this service information as applicable to do
the actions required by this AD, unless the AD specifies otherwise.
(i) Transport Canada AD CF-2023-30, dated May 8, 2023.
(ii) [Reserved]
(3) For Transport Canada AD CF-2023-30, contact Transport
Canada, Transport Canada National Aircraft Certification, 159
Cleopatra Drive, Nepean, Ontario K1A 0N5, Canada; phone: (888) 663-
3639; email: <a href="/cdn-cgi/l/email-protection#f5a1b6dbb49c87829a87819d9c9b908686b19c879096819c839086d8b69a9b869c929b908691909b94839c9294979c999c8190dba1b6b58196db9296db9694"><span class="__cf_email__" data-cfemail="84d0c7aac5edf6f3ebf6f0ecedeae1f7f7c0edf6e1e7f0edf2e1f7a9c7ebeaf7ede3eae1f7e0e1eae5f2ede3e5e6ede8edf0e1aad0c7c4f0e7aae3e7aae7e5">[email protected]</span></a>; website: tc.canada.ca/en/
aviation.
(4) 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.
(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 <a href="http://www.archives.gov/federal-register/cfr/ibr-locations">www.archives.gov/federal-register/cfr/ibr-locations</a> or email <a href="/cdn-cgi/l/email-protection#8debffa3e4e3fefde8eef9e4e2e3cde3ecffeca3eae2fb"><span class="__cf_email__" data-cfemail="6402164a0d0a17140107100d0b0a240a0516054a030b12">[email protected]</span></a>.
Issued on January 31, 2024.
Victor Wicklund,
Deputy Director, Compliance & Airworthiness Division, Aircraft
Certification Service.
[FR Doc. 2024-03442 Filed 2-20-24; 8:45 am]
BILLING CODE 4910-13-P
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