Airworthiness Directives; Pratt & Whitney Canada Corp. Engines, 93225-93228 [2024-27659]

Download as PDF lotter on DSK11XQN23PROD with PROPOSALS1 Federal Register / Vol. 89, No. 228 / Tuesday, November 26, 2024 / Proposed Rules attachments, will become part of the public record, and the Commission will make comments available for public viewing on the Commission’s website and in the Commission’s Public Records Office. Accordingly, commenters should not provide in their comments any information that they do not wish to make public, such as a home street address, personal email address, date of birth, phone number, social security number, or driver’s license number, or any information that is restricted from disclosure, such as trade secrets or commercial or financial information that is privileged or confidential. FOR FURTHER INFORMATION CONTACT: Robert M. Knop, Assistant General Counsel, or Joanna S. Waldstreicher, Attorney, 1050 First Street NE, Washington, DC 20463, (202) 694–1650 or (800) 424–9530. SUPPLEMENTARY INFORMATION: On October 22, 2024, the Commission received a Petition for Rulemaking (‘‘Petition’’) from Ken Paxton, Attorney General of Texas. The Petition asks the Commission to adopt two amendments to its regulations concerning the use of credit cards to make contributions, to address the potential use of prepaid cards to circumvent contribution amount limitations and source prohibitions. The Federal Election Campaign Act (the ‘‘Act’’) limits the total amount a contributor may contribute to any given political committee.1 The Act and Commission regulations also prohibit certain persons from making contributions at all.2 The Act and Commission regulations further prohibit any person from making a contribution in the name of another person.3 In addition, the Act and Commission regulations require political committees to disclose identifying information from each contributor, including name, address, and—in some cases—the contributor’s occupation and employer.4 The Petition asserts that ‘‘there has been substantial public reporting regarding potentially fraudulent transactions on political committee online platforms. Certain platforms appear to facilitate straw donor transactions, where a contributor disguises his identity by attributing his contribution to another, unaware person.’’ 5 The Petition further states that ‘‘prepaid cards are a favorite tool of U.S.C. 30116(a); see also 11 CFR 110.1, 110.2. U.S.C. 30118, 30119, 30121; see also 11 CFR 110.4, 110.9(a), 110.14(c)(2), 114.2, 115.2, 300.10. 3 52 U.S.C. 30122; see also 11 CFR 110.4(b). 4 52 U.S.C. 30104; 11 CFR 104.3, 104.8. 5 Petition at 1. fraudsters,’’ 6 and that ‘‘specific security measures can mitigate this problem,’’ such as comparing the identifying information supplied by contributors to the name, address, and other billing information on file with the issuer of the credit card used to make the contribution.7 Accordingly, the Petition states that ‘‘new regulations governing electronic payment acceptance and related problems are critical to ensuring the integrity of campaign finance laws.’’ 8 The Petition asks the Commission to adopt two amendments to 11 CFR 104.14: • Amend 104.14(b)(5) to provide that records for contributions made by credit, debit, prepaid, or gift card must include documentation confirming that a cross-check occurred between the contributor’s self-reported identifying information with the card issuing institution’s own information on the name and billing address of the cardholder. • Amend 104.14(e) to provide that contributions cannot be accepted from prepaid or gift cards unless the information from those prepaid or gift cards can be cross-checked with the card issuing institution to confirm the name and billing address required under paragraph (b)(5) of this rule.9 The Commission seeks comment on the Petition. The public may inspect the Petition on the Commission’s website at https://www.fec.gov/fosers/ (reference REG 2024–08). The Commission will not consider the Petition’s merits until after the comment period closes. If the Commission decides that the Petition has merit, it may begin a rulemaking proceeding. The Commission will announce any action that it takes in the Federal Register. Dated: November 19, 2024. On behalf of the Commission, Sean J. Cooksey, Chairman, Federal Election Commission. [FR Doc. 2024–27583 Filed 11–25–24; 8:45 am] BILLING CODE 6715–01–P 1 52 2 52 VerDate Sep<11>2014 17:36 Nov 25, 2024 Jkt 265001 6 Id. 7 Petition at 3. at 1. 9 Petition at 7. 8 Petition PO 00000 Frm 00003 Fmt 4702 Sfmt 4702 93225 DEPARTMENT OF TRANSPORTATION Federal Aviation Administration 14 CFR Part 39 [Docket No. FAA–2024–2539; Project Identifier MCAI–2023–00971–E] RIN 2120–AA64 Airworthiness Directives; Pratt & Whitney Canada Corp. Engines Federal Aviation Administration (FAA), DOT. ACTION: Notice of proposed rulemaking (NPRM). AGENCY: The FAA proposes to adopt a new airworthiness directive (AD) for certain Pratt & Whitney Canada Corp. (P&WC) Model PW535E and PW535E1 engines. This proposed AD was prompted by a manufacturer design review that indicated certain flange bolts securing the gas generator case and turbine support case are susceptible to cracking at their current low-cycle fatigue (LCF) life. This proposed AD would require repetitive borescope inspections (BSI) of the gas generator case to turbine support case retaining bolts for evidence of bolt cracks, bolt fracture, missing bolts, or loose bolts and replacement, if necessary, as specified in a Transport Canada AD, which is incorporated by reference. The FAA is proposing this AD to address the unsafe condition on these products. DATES: The FAA must receive comments on this NPRM by January 10, 2025. ADDRESSES: You may send comments, using the procedures found in 14 CFR 11.43 and 11.45, by any of the following methods: • Federal eRulemaking Portal: Go to regulations.gov. Follow the instructions for submitting comments. • Fax: (202) 493–2251. • Mail: U.S. Department of Transportation, Docket Operations, M– 30, West Building Ground Floor, Room W12–140, 1200 New Jersey Avenue SE, Washington, DC 20590. • Hand Delivery: Deliver to Mail address above between 9 a.m. and 5 p.m., Monday through Friday, except Federal holidays. AD Docket: You may examine the AD docket at regulations.gov under Docket No. FAA–2024–2539; or in person at Docket Operations between 9 a.m. and 5 p.m., Monday through Friday, except Federal holidays. The AD docket contains this NPRM, the mandatory continuing airworthiness information (MCAI), any comments received, and other information. The street address for Docket Operations is listed above. SUMMARY: E:\FR\FM\26NOP1.SGM 26NOP1 93226 Federal Register / Vol. 89, No. 228 / Tuesday, November 26, 2024 / Proposed Rules Material Incorporated by Reference: • For Transport Canada material identified in this proposed AD, contact Transport Canada, Transport Canada National Aircraft Certification, 159 Cleopatra Drive, Nepean, Ontario, K1A 0N5, Canada; phone: (888) 663–3639; email: TC.AirworthinessDirectivesConsignesdenavigabilite.TC@tc.gc.ca; website: tc.canada.ca/en/aviation. • You may view this material 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. FOR FURTHER INFORMATION CONTACT: Barbara Caufield, Aviation Safety Engineer, FAA, 2200 South 216th Street, Des Moines, WA 98198; phone: (781) 238–7146; email: barbara.caufield@ faa.gov. SUPPLEMENTARY INFORMATION: lotter on DSK11XQN23PROD with PROPOSALS1 Comments Invited The FAA invites you to send any written relevant data, views, or arguments about this proposal. Send your comments to an address listed under ADDRESSES. Include ‘‘Docket No. FAA–2024–2539; Project Identifier MCAI–2023–00971–E’’ at the beginning of your comments. The most helpful comments reference a specific portion of the proposal, explain the reason for any recommended change, and include supporting data. The FAA will consider all comments received by the closing date and may amend this proposal because of those comments. Except for Confidential Business Information (CBI) as described in the following paragraph, and other information as described in 14 CFR 11.35, the FAA will post all comments received, without change, to regulations.gov, including any personal information you provide. The agency will also post a report summarizing each substantive verbal contact received about this NPRM. Confidential Business Information CBI is commercial or financial information that is both customarily and actually treated as private by its owner. Under the Freedom of Information Act (FOIA) (5 U.S.C. 552), CBI is exempt from public disclosure. If your comments responsive to this NPRM contain commercial or financial information that is customarily treated as private, that you actually treat as private, and that is relevant or responsive to this NPRM, it is important VerDate Sep<11>2014 17:36 Nov 25, 2024 Jkt 265001 that you clearly designate the submitted comments as CBI. Please mark each page of your submission containing CBI as ‘‘PROPIN.’’ The FAA will treat such marked submissions as confidential under the FOIA, and they will not be placed in the public docket of this NPRM. Submissions containing CBI should be sent to Barbara Caufield, Aviation Safety Engineer, FAA, 2200 South 216th Street, Des Moines, WA 98198. Any commentary that the FAA receives which is not specifically designated as CBI will be placed in the public docket for this rulemaking. Background Transport Canada, which is the aviation authority for Canada, has issued Transport Canada AD CF–2023– 60, dated August 14, 2023 (Transport Canada AD CF–2023–60) (also referred to as the MCAI), to correct an unsafe condition for certain P&WC Model PW535E and PW535E1 engines. The MCAI states that data from a design review by the manufacturer identified insufficient LCF life for flange bolts securing the engine gas generator and turbine support case. At certain highstress circumferential locations, LCF cracks could develop on the flange bolt and lead to fracture of the bolt. To address this potential unsafe condition, the manufacturer published material that provides instructions for repetitive BSIs and replacement of the affected parts. The FAA is proposing this AD to prevent fracture of the gas generator case to turbine support case retaining bolts. The unsafe condition, if not addressed, could result in uncontained engine debris, damage to the engine, and damage to the airplane. You may examine the MCAI in the AD docket at regulations.gov under Docket No. FAA–2024–2539. Material Incorporated by Reference Under 1 CFR Part 51 The FAA reviewed Transport Canada AD CF–2023–60, which identifies the affected gas generator case to turbine support case retaining bolts and specifies procedures for repetitive BSIs and replacement. This material is reasonably available because the interested parties have access to it through their normal course of business or by the means identified in the ADDRESSES section. FAA’s Determination These products have been approved by the aviation authority of another country and are approved for operation in the United States. Pursuant to the PO 00000 Frm 00004 Fmt 4702 Sfmt 4702 FAA’s bilateral agreement with this State of Design Authority, it has notified the FAA of the unsafe condition described in the MCAI referenced above. The FAA is issuing this NPRM after determining that the unsafe condition described previously is likely to exist or develop on other products of the same type design. Proposed AD Requirements in This NPRM This proposed AD would require accomplishing the actions specified in Transport Canada AD CF–2023–60 described previously, except for any differences identified as exceptions in the regulatory text of this proposed AD and except as discussed under ‘‘Differences Between this Proposed AD and the MCAI.’’ Differences Between This Proposed AD and the MCAI Where the service information referenced in Transport Canada AD CF– 2023–60 requires reporting certain information to the manufacturer, this proposed AD would not require such a submission. Explanation of Required Compliance Information In the FAA’s ongoing efforts to improve the efficiency of the AD process, the FAA developed a process to use some civil aviation authority (CAA) ADs as the primary source of information for compliance with requirements for corresponding FAA ADs. The FAA has been coordinating this process with manufacturers and CAAs. As a result, the FAA proposes to incorporate Transport Canada AD CF– 2023–60 by reference in the FAA final rule. This proposed AD would, therefore, require compliance with Transport Canada AD CF–2023–60 in its entirety through that incorporation, except for any differences identified as exceptions in the regulatory text of this proposed AD. Material required by Transport Canada AD CF–2023–60 for compliance will be available at regulations.gov under Docket No. FAA– 2024–2539 after the FAA final rule is published. Costs of Compliance The FAA estimates that this AD, if adopted as proposed, would affect 1,042 engines installed on airplanes of U.S. registry. The FAA estimates the following costs to comply with this proposed AD: E:\FR\FM\26NOP1.SGM 26NOP1 Federal Register / Vol. 89, No. 228 / Tuesday, November 26, 2024 / Proposed Rules 93227 ESTIMATED COSTS Action Labor cost BSI of gas generator case to turbine support case retaining bolts. 2 work-hours × $85 per hour = $170 ............. The FAA estimates the following costs to do any necessary replacements that would be required based on the Cost per product Parts cost results of the proposed inspection. The agency has no way of determining the $0 $170 Cost on U.S. operators $177,140 number of engines that might need these replacements: ON-CONDITION COSTS Action Labor cost Replacement of the gas generator case to turbine support case retaining bolts. 4 work-hours × $85 per hour = $340 ........................... lotter on DSK11XQN23PROD with PROPOSALS1 Accordingly, under the authority delegated to me by the Administrator, the FAA proposes to amend 14 CFR part 39 as follows: (f) Compliance Comply with this AD within the compliance times specified, unless already done. Air transportation, Aircraft, Aviation safety, Incorporation by reference, Safety. VerDate Sep<11>2014 17:36 Nov 25, 2024 Jkt 265001 $4,840 The Proposed Amendment List of Subjects in 14 CFR Part 39 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. The FAA determined that this proposed AD would not have federalism implications under Executive Order 13132. This proposed AD would not have a substantial direct effect on the States, on the relationship between the national government and the States, or on the distribution of power and responsibilities among the various levels of government. For the reasons discussed above, I certify this proposed regulation: (1) Is not a ‘‘significant regulatory action’’ under Executive Order 12866, (2) Would not affect intrastate aviation in Alaska, and (3) Would not have a significant economic impact, positive or negative, on a substantial number of small entities under the criteria of the Regulatory Flexibility Act. $4,500 Cost per product turbine support case have an inadequate lowcycle fatigue life. The FAA is issuing this AD to prevent fracture of the gas generator case to turbine support case retaining bolts. The unsafe condition, if not addressed, could result in uncontained engine debris, damage to the engine, and damage to the airplane. Authority for This Rulemaking Regulatory Findings Parts cost 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: ■ Pratt & Whitney Canada Corp.: Docket No. FAA–2024–2539; Project Identifier MCAI–2023–00971–E. (a) Comments Due Date The FAA must receive comments on this airworthiness directive (AD) by January 10, 2025. (b) Affected ADs None. (c) Applicability This AD applies to Pratt & Whitney Canada Corp. (P&WC) Model PW535E and P&WC Model PW535E1 engines, as identified in Transport Canada Civil Aviation AD CF– 2023–60, dated August 14, 2023 (Transport Canada AD CF–2023–60). (d) Subject Joint Aircraft System Component (JASC) Code 7250, Turbine Section. (e) Unsafe Condition This AD was prompted by a manufacturer design review that indicated certain flange bolts securing the gas generator case and PO 00000 Frm 00005 Fmt 4702 Sfmt 4702 (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–2023–60. (h) Exceptions to Transport Canada AD CF– 2023–60 (1) Where Transport Canada AD CF–2023– 60 requires compliance from its effective date, this AD requires using the effective date of this AD. (2) Where paragraph A.1. of Transport Canada AD CF–2023–60 refers to ‘‘discrepancy,’’ this AD defines that as ‘‘evidence of bolt cracks, bolt fracture, missing bolts, or loose bolts.’’ (3) Where paragraph A.2. in Transport Canada AD CF–2023–60 specifies to ‘‘Repeat the above paragraph A.1. inspection and rectification requirements of this AD at intervals not to exceed 400 engine cycles,’’ this AD requires replacing that text with ‘‘Repeat the above paragraph A.1. inspection and rectification requirements of this AD thereafter at intervals not to exceed 400 engine cycles.’’ (4) Where paragraph A.1. in Transport Canada AD CF–2023–60 specifies to ‘‘Inspect the bolts P/N MS9696–08 and P/N MS9489– 06 within 400 cycles from the effective date of this AD,’’ this AD requires replacing that text with ‘‘Inspect affected bolts having P/N MS9696–08 and P/N MS9489–06 within 400 engine cycles from the effective date of this AD.’’ (5) Where paragraph A.1. in Transport Canada AD CF–2023–60 specifies to ‘‘rectify any discrepancy in accordance with the E:\FR\FM\26NOP1.SGM 26NOP1 93228 Federal Register / Vol. 89, No. 228 / Tuesday, November 26, 2024 / Proposed Rules Accomplishment Instructions of the applicable SB,’’ this AD requires replacing that text with ‘‘Following inspection, if any bolts are determined to be in an unserviceable condition, before further flight, replace the affected bolts in accordance with the applicable SB.’’ Issued on November 20, 2024. Peter A. White, Deputy Director, Integrated Certificate Management Division, Aircraft Certification Service. [FR Doc. 2024–27659 Filed 11–25–24; 8:45 am] BILLING CODE 4910–13–P (i) No Reporting Requirement Although the service information referenced in Transport Canada AD CF– 2023–60 specifies to submit certain information to the manufacturer, this AD does not include that requirement. DEPARTMENT OF TRANSPORTATION Federal Aviation Administration 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 (k) of this AD and email to: AMOC@faa.gov. (2) Before using any approved AMOC, notify your appropriate principal inspector, or lacking a principal inspector, the manager of the local flight standards district office/ certificate holding district office. (k) Additional Information For more information about this AD, contact Barbara Caufield, Aviation Safety Engineer, FAA, 2200 South 216th Street, Des Moines, WA 98198; phone: (781) 238–7146; email: barbara.caufield@faa.gov. lotter on DSK11XQN23PROD with PROPOSALS1 (l) Material Incorporated by Reference (1) The Director of the Federal Register approved the incorporation by reference (IBR) of the material listed in this paragraph under 5 U.S.C. 552(a) and 1 CFR part 51. (2) You must use this material as applicable to do the actions required by this AD, unless the AD specifies otherwise. (i) Transport Canada AD CF–2023–60, dated August 14, 2023. (ii) [Reserved] (3) For Transport Canada material identified in this AD, contact Transport Canada, Transport Canada National Aircraft Certification, 159 Cleopatra Drive, Nepean, Ontario K1A 0N5, Canada; phone: (888) 663– 3639; email: TC.AirworthinessDirectivesConsignesdenavigabilite.TC@tc.gc.ca; website: tc.canada.ca/en/aviation. (4) You may view this material 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 www.archives.gov/federal-register/cfr/ ibr-locations or email fr.inspection@nara.gov. VerDate Sep<11>2014 17:36 Nov 25, 2024 Jkt 265001 Comments Invited 14 CFR Part 39 (j) Alternative Methods of Compliance (AMOCs) [Docket No. FAA–2024–2540; Project Identifier AD–2024–00343–E] RIN 2120–AA64 Airworthiness Directives; General Electric Company Engines. Federal Aviation Administration (FAA), DOT. ACTION: Notice of proposed rulemaking (NPRM). AGENCY: The FAA proposes to adopt a new airworthiness directive (AD) for certain General Electric Company (GE) Model CT7–5A2, CT7–5A3, CT7–7A, CT7–7A1, CT7–9B, CT7–9B1, CT7–9B2, CT7–9C, CT7–9C3, CT7–9D, and CT7– 9D2 engines. This proposed AD was prompted by the manufacturer’s determination that certain GE Model CT7 fleets have affected cooling plates installed that do not meet lifing guidelines. This proposed AD would require replacement of the stage 1 turbine forward cooling plate and the stage 2 turbine aft cooling plate. The FAA is proposing this AD to address the unsafe condition on these products. DATES: The FAA must receive comments on this proposed AD by January 10, 2025. SUMMARY: You may send comments, using the procedures found in 14 CFR 11.43 and 11.45, by any of the following methods: • Federal eRulemaking Portal: Go to regulations.gov. Follow the instructions for submitting comments. • Fax: (202) 493–2251. • Mail: U.S. Department of Transportation, Docket Operations, M– 30, West Building Ground Floor, Room W12–140, 1200 New Jersey Avenue SE, Washington, DC 20590. • Hand Delivery: Deliver to Mail address above between 9 a.m. and 5 p.m., Monday through Friday, except Federal holidays. AD Docket: You may examine the AD docket at regulations.gov under Docket No. FAA–2024–2540; or in person at Docket Operations between 9 a.m. and 5 p.m., Monday through Friday, except ADDRESSES: PO 00000 Frm 00006 Fmt 4702 Federal holidays. The AD docket contains this NPRM, any comments received, and other information. The street address for Docket Operations is listed above. 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: Sfmt 4702 The FAA invites you to send any written relevant data, views, or arguments about this proposal. Send your comments to an address listed under the ADDRESSES section. Include ‘‘Docket No. FAA–2024–2540; Project Identifier AD–2024–00343–E’’ at the beginning of your comments. The most helpful comments reference a specific portion of the proposal, explain the reason for any recommended change, and include supporting data. The FAA will consider all comments received by the closing date and may revise this proposal because of those comments. Except for Confidential Business Information (CBI) as described in the following paragraph, and other information as described in 14 CFR 11.35, the FAA will post all comments received, without change, to regulations.gov, including any personal information you provide. The agency will also post a report summarizing each substantive verbal contact received about this NPRM. Confidential Business Information CBI is commercial or financial information that is both customarily and actually treated as private by its owner. Under the Freedom of Information Act (FOIA) (5 U.S.C. 552), CBI is exempt from public disclosure. If your comments responsive to this NPRM contain commercial or financial information that is customarily treated as private, that you actually treat as private, and that is relevant or responsive to this NPRM, it is important that you clearly designate the submitted comments as CBI. Please mark each page of your submission containing CBI as ‘‘PROPIN.’’ The FAA will treat such marked submissions as confidential under the FOIA, and they will not be placed in the public docket of this NPRM. Submissions containing CBI should be sent to Sungmo Cho, Aviation Safety Engineer, FAA, 2200 South 216th Street, Des Moines, WA 98198. Any commentary that the FAA receives which is not specifically designated as CBI will be placed in the public docket for this rulemaking. E:\FR\FM\26NOP1.SGM 26NOP1

Agencies

[Federal Register Volume 89, Number 228 (Tuesday, November 26, 2024)]
[Proposed Rules]
[Pages 93225-93228]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 2024-27659]


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DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2024-2539; Project Identifier MCAI-2023-00971-E]
RIN 2120-AA64


Airworthiness Directives; Pratt & Whitney Canada Corp. Engines

AGENCY: Federal Aviation Administration (FAA), DOT.

ACTION: Notice of proposed rulemaking (NPRM).

-----------------------------------------------------------------------

SUMMARY: The FAA proposes to adopt a new airworthiness directive (AD) 
for certain Pratt & Whitney Canada Corp. (P&WC) Model PW535E and 
PW535E1 engines. This proposed AD was prompted by a manufacturer design 
review that indicated certain flange bolts securing the gas generator 
case and turbine support case are susceptible to cracking at their 
current low-cycle fatigue (LCF) life. This proposed AD would require 
repetitive borescope inspections (BSI) of the gas generator case to 
turbine support case retaining bolts for evidence of bolt cracks, bolt 
fracture, missing bolts, or loose bolts and replacement, if necessary, 
as specified in a Transport Canada AD, which is incorporated by 
reference. The FAA is proposing this AD to address the unsafe condition 
on these products.

DATES: The FAA must receive comments on this NPRM by January 10, 2025.

ADDRESSES: You may send comments, using the procedures found in 14 CFR 
11.43 and 11.45, by any of the following methods:
     Federal eRulemaking Portal: Go to regulations.gov. Follow 
the instructions for submitting comments.
     Fax: (202) 493-2251.
     Mail: U.S. Department of Transportation, Docket 
Operations, M-30, West Building Ground Floor, Room W12-140, 1200 New 
Jersey Avenue SE, Washington, DC 20590.
     Hand Delivery: Deliver to Mail address above between 9 
a.m. and 5 p.m., Monday through Friday, except Federal holidays.
    AD Docket: You may examine the AD docket at regulations.gov under 
Docket No. FAA-2024-2539; or in person at Docket Operations between 9 
a.m. and 5 p.m., Monday through Friday, except Federal holidays. The AD 
docket contains this NPRM, the mandatory continuing airworthiness 
information (MCAI), any comments received, and other information. The 
street address for Docket Operations is listed above.

[[Page 93226]]

    Material Incorporated by Reference:
     For Transport Canada material identified in this proposed 
AD, contact Transport Canada, Transport Canada National Aircraft 
Certification, 159 Cleopatra Drive, Nepean, Ontario, K1A 0N5, Canada; 
phone: (888) 663-3639; email: [email protected]; website: tc.canada.ca/en/aviation.
     You may view this material 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.

FOR FURTHER INFORMATION CONTACT: Barbara Caufield, Aviation Safety 
Engineer, FAA, 2200 South 216th Street, Des Moines, WA 98198; phone: 
(781) 238-7146; email: [email protected].

SUPPLEMENTARY INFORMATION:

Comments Invited

    The FAA invites you to send any written relevant data, views, or 
arguments about this proposal. Send your comments to an address listed 
under ADDRESSES. Include ``Docket No. FAA-2024-2539; Project Identifier 
MCAI-2023-00971-E'' at the beginning of your comments. The most helpful 
comments reference a specific portion of the proposal, explain the 
reason for any recommended change, and include supporting data. The FAA 
will consider all comments received by the closing date and may amend 
this proposal because of those comments.
    Except for Confidential Business Information (CBI) as described in 
the following paragraph, and other information as described in 14 CFR 
11.35, the FAA will post all comments received, without change, to 
regulations.gov, including any personal information you provide. The 
agency will also post a report summarizing each substantive verbal 
contact received about this NPRM.

Confidential Business Information

    CBI is commercial or financial information that is both customarily 
and actually treated as private by its owner. Under the Freedom of 
Information Act (FOIA) (5 U.S.C. 552), CBI is exempt from public 
disclosure. If your comments responsive to this NPRM contain commercial 
or financial information that is customarily treated as private, that 
you actually treat as private, and that is relevant or responsive to 
this NPRM, it is important that you clearly designate the submitted 
comments as CBI. Please mark each page of your submission containing 
CBI as ``PROPIN.'' The FAA will treat such marked submissions as 
confidential under the FOIA, and they will not be placed in the public 
docket of this NPRM. Submissions containing CBI should be sent to 
Barbara Caufield, Aviation Safety Engineer, FAA, 2200 South 216th 
Street, Des Moines, WA 98198. Any commentary that the FAA receives 
which is not specifically designated as CBI will be placed in the 
public docket for this rulemaking.

Background

    Transport Canada, which is the aviation authority for Canada, has 
issued Transport Canada AD CF-2023-60, dated August 14, 2023 (Transport 
Canada AD CF-2023-60) (also referred to as the MCAI), to correct an 
unsafe condition for certain P&WC Model PW535E and PW535E1 engines. The 
MCAI states that data from a design review by the manufacturer 
identified insufficient LCF life for flange bolts securing the engine 
gas generator and turbine support case. At certain high-stress 
circumferential locations, LCF cracks could develop on the flange bolt 
and lead to fracture of the bolt. To address this potential unsafe 
condition, the manufacturer published material that provides 
instructions for repetitive BSIs and replacement of the affected parts. 
The FAA is proposing this AD to prevent fracture of the gas generator 
case to turbine support case retaining bolts. The unsafe condition, if 
not addressed, could result in uncontained engine debris, damage to the 
engine, and damage to the airplane.
    You may examine the MCAI in the AD docket at regulations.gov under 
Docket No. FAA-2024-2539.

Material Incorporated by Reference Under 1 CFR Part 51

    The FAA reviewed Transport Canada AD CF-2023-60, which identifies 
the affected gas generator case to turbine support case retaining bolts 
and specifies procedures for repetitive BSIs and replacement. This 
material is reasonably available because the interested parties have 
access to it through their normal course of business or by the means 
identified in the ADDRESSES section.

FAA's Determination

    These products have been approved by the aviation authority of 
another country and are approved for operation in the United States. 
Pursuant to the FAA's bilateral agreement with this State of Design 
Authority, it has notified the FAA of the unsafe condition described in 
the MCAI referenced above. The FAA is issuing this NPRM after 
determining that the unsafe condition described previously is likely to 
exist or develop on other products of the same type design.

Proposed AD Requirements in This NPRM

    This proposed AD would require accomplishing the actions specified 
in Transport Canada AD CF-2023-60 described previously, except for any 
differences identified as exceptions in the regulatory text of this 
proposed AD and except as discussed under ``Differences Between this 
Proposed AD and the MCAI.''

Differences Between This Proposed AD and the MCAI

    Where the service information referenced in Transport Canada AD CF-
2023-60 requires reporting certain information to the manufacturer, 
this proposed AD would not require such a submission.

Explanation of Required Compliance Information

    In the FAA's ongoing efforts to improve the efficiency of the AD 
process, the FAA developed a process to use some civil aviation 
authority (CAA) ADs as the primary source of information for compliance 
with requirements for corresponding FAA ADs. The FAA has been 
coordinating this process with manufacturers and CAAs. As a result, the 
FAA proposes to incorporate Transport Canada AD CF-2023-60 by reference 
in the FAA final rule. This proposed AD would, therefore, require 
compliance with Transport Canada AD CF-2023-60 in its entirety through 
that incorporation, except for any differences identified as exceptions 
in the regulatory text of this proposed AD. Material required by 
Transport Canada AD CF-2023-60 for compliance will be available at 
regulations.gov under Docket No. FAA-2024-2539 after the FAA final rule 
is published.

Costs of Compliance

    The FAA estimates that this AD, if adopted as proposed, would 
affect 1,042 engines installed on airplanes of U.S. registry.
    The FAA estimates the following costs to comply with this proposed 
AD:

[[Page 93227]]



                                                 Estimated Costs
----------------------------------------------------------------------------------------------------------------
                                                                                     Cost per      Cost on U.S.
               Action                         Labor cost            Parts cost        product        operators
----------------------------------------------------------------------------------------------------------------
BSI of gas generator case to         2 work-hours x $85 per hour              $0            $170        $177,140
 turbine support case retaining       = $170.
 bolts.
----------------------------------------------------------------------------------------------------------------

    The FAA estimates the following costs to do any necessary 
replacements that would be required based on the results of the 
proposed inspection. The agency has no way of determining the number of 
engines that might need these replacements:

                                               On-Condition Costs
----------------------------------------------------------------------------------------------------------------
                                                                                                     Cost per
                   Action                                 Labor cost                Parts cost        product
----------------------------------------------------------------------------------------------------------------
Replacement of the gas generator case to     4 work-hours x $85 per hour = $340.          $4,500          $4,840
 turbine support case retaining bolts.
----------------------------------------------------------------------------------------------------------------

Authority for This Rulemaking

    Title 49 of the United States Code specifies the FAA's authority to 
issue rules on aviation safety. Subtitle I, section 106, describes the 
authority of the FAA Administrator. Subtitle VII: Aviation Programs, 
describes in more detail the scope of the Agency's authority.
    The FAA is issuing this rulemaking under the authority described in 
Subtitle VII, Part A, Subpart III, Section 44701: General requirements. 
Under that section, Congress charges the FAA with promoting safe flight 
of civil aircraft in air commerce by prescribing regulations for 
practices, methods, and procedures the Administrator finds necessary 
for safety in air commerce. This regulation is within the scope of that 
authority because it addresses an unsafe condition that is likely to 
exist or develop on products identified in this rulemaking action.

Regulatory Findings

    The FAA determined that this proposed AD would not have federalism 
implications under Executive Order 13132. This proposed AD would not 
have a substantial direct effect on the States, on the relationship 
between the national government and the States, or on the distribution 
of power and responsibilities among the various levels of government.
    For the reasons discussed above, I certify this proposed 
regulation:
    (1) Is not a ``significant regulatory action'' under Executive 
Order 12866,
    (2) Would not affect intrastate aviation in Alaska, and
    (3) Would not have a significant economic impact, positive or 
negative, on a substantial number of small entities under the criteria 
of the Regulatory Flexibility Act.

List of Subjects in 14 CFR Part 39

    Air transportation, Aircraft, Aviation safety, Incorporation by 
reference, Safety.

The Proposed Amendment

    Accordingly, under the authority delegated to me by the 
Administrator, the FAA proposes to amend 14 CFR part 39 as follows:

PART 39--AIRWORTHINESS DIRECTIVES

0
1. The authority citation for part 39 continues to read as follows:

    Authority:  49 U.S.C. 106(g), 40113, 44701.


Sec.  39.13  [Amended]

0
2. The FAA amends Sec.  39.13 by adding the following new airworthiness 
directive:

Pratt & Whitney Canada Corp.: Docket No. FAA-2024-2539; Project 
Identifier MCAI-2023-00971-E.

(a) Comments Due Date

    The FAA must receive comments on this airworthiness directive 
(AD) by January 10, 2025.

(b) Affected ADs

    None.

(c) Applicability

    This AD applies to Pratt & Whitney Canada Corp. (P&WC) Model 
PW535E and P&WC Model PW535E1 engines, as identified in Transport 
Canada Civil Aviation AD CF-2023-60, dated August 14, 2023 
(Transport Canada AD CF-2023-60).

(d) Subject

    Joint Aircraft System Component (JASC) Code 7250, Turbine 
Section.

(e) Unsafe Condition

    This AD was prompted by a manufacturer design review that 
indicated certain flange bolts securing the gas generator case and 
turbine support case have an inadequate low-cycle fatigue life. The 
FAA is issuing this AD to prevent fracture of the gas generator case 
to turbine support case retaining bolts. The unsafe condition, if 
not addressed, could result in uncontained engine debris, damage to 
the engine, and damage to 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-2023-60.

(h) Exceptions to Transport Canada AD CF-2023-60

    (1) Where Transport Canada AD CF-2023-60 requires compliance 
from its effective date, this AD requires using the effective date 
of this AD.
    (2) Where paragraph A.1. of Transport Canada AD CF-2023-60 
refers to ``discrepancy,'' this AD defines that as ``evidence of 
bolt cracks, bolt fracture, missing bolts, or loose bolts.''
    (3) Where paragraph A.2. in Transport Canada AD CF-2023-60 
specifies to ``Repeat the above paragraph A.1. inspection and 
rectification requirements of this AD at intervals not to exceed 400 
engine cycles,'' this AD requires replacing that text with ``Repeat 
the above paragraph A.1. inspection and rectification requirements 
of this AD thereafter at intervals not to exceed 400 engine 
cycles.''
    (4) Where paragraph A.1. in Transport Canada AD CF-2023-60 
specifies to ``Inspect the bolts P/N MS9696-08 and P/N MS9489-06 
within 400 cycles from the effective date of this AD,'' this AD 
requires replacing that text with ``Inspect affected bolts having P/
N MS9696-08 and P/N MS9489-06 within 400 engine cycles from the 
effective date of this AD.''
    (5) Where paragraph A.1. in Transport Canada AD CF-2023-60 
specifies to ``rectify any discrepancy in accordance with the

[[Page 93228]]

Accomplishment Instructions of the applicable SB,'' this AD requires 
replacing that text with ``Following inspection, if any bolts are 
determined to be in an unserviceable condition, before further 
flight, replace the affected bolts in accordance with the applicable 
SB.''

(i) No Reporting Requirement

    Although the service information referenced in Transport Canada 
AD CF-2023-60 specifies to submit certain information to the 
manufacturer, this AD does not include that requirement.

(j) Alternative Methods of Compliance (AMOCs)

    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 (k) of this AD and email to: [email protected].
    (2) Before using any approved AMOC, notify your appropriate 
principal inspector, or lacking a principal inspector, the manager 
of the local flight standards district office/certificate holding 
district office.

(k) Additional Information

    For more information about this AD, contact Barbara Caufield, 
Aviation Safety Engineer, FAA, 2200 South 216th Street, Des Moines, 
WA 98198; phone: (781) 238-7146; email: [email protected].

(l) Material Incorporated by Reference

    (1) The Director of the Federal Register approved the 
incorporation by reference (IBR) of the material listed in this 
paragraph under 5 U.S.C. 552(a) and 1 CFR part 51.
    (2) You must use this material as applicable to do the actions 
required by this AD, unless the AD specifies otherwise.
    (i) Transport Canada AD CF-2023-60, dated August 14, 2023.
    (ii) [Reserved]
    (3) For Transport Canada material identified in this AD, contact 
Transport Canada, Transport Canada National Aircraft Certification, 
159 Cleopatra Drive, Nepean, Ontario K1A 0N5, Canada; phone: (888) 
663-3639; email: [email protected]; website: tc.canada.ca/en/
aviation.
    (4) You may view this material 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 www.archives.gov/federal-register/cfr/ibr-locations or email [email protected].

    Issued on November 20, 2024.
Peter A. White,
Deputy Director, Integrated Certificate Management Division, Aircraft 
Certification Service.
[FR Doc. 2024-27659 Filed 11-25-24; 8:45 am]
BILLING CODE 4910-13-P

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