Airworthiness Directives; Pratt & Whitney Canada Corporation Turboprop Engines, 4111-4114 [2023-01148]

Download as PDF Federal Register / Vol. 88, No. 15 / Tuesday, January 24, 2023 / Proposed Rules tkelley on DSK125TN23PROD with PROPOSALS The existing capital frameworks— particularly the A–IRB approach—have expanded the use of floors to address these shortcomings in modeling. These frameworks impose floors on measures—such as probability of default (PD), loss given default (LGD), and riskweights—that apply to certain exposures. These floors prevent the measures from falling below specified levels, even if the modeling would otherwise result in lower levels. The existing capital frameworks include both input floors, for measures such as PD and LGD,36 and output floors (i.e., risk-weight floors to be applied when model outputs are lower than the floor) for different exposures. If FCA adopts Basel Framework-based requirements, should it establish floors similar to those in the existing capital frameworks? If so, what should those floors be and why? Given the differences among the risk-weight floors established in the other capital frameworks, is there a policy among them that should be considered the most readily transferrable to a Farmer Mac capital framework, or should FCA develop Farmer Mac-specific riskweight floors? 5. The existing capital frameworks require entities to hold capital over the minimum requirements—referred to as ‘‘buffers’’—to avoid restrictions on dividend payouts and discretionary bonuses. The existing capital frameworks include different types of buffers including, but not limited to, a capital conservation buffer and a countercyclical buffer.37 Should capital buffers be required for Farmer Mac and, if so, what type should FCA consider? 6. The existing capital frameworks require certain entities to make capitalrelated public disclosures to improve market discipline and transparency.38 36 For example, see Basel Framework at CRE32.4 for PD floor and CRE 32.16 for LGD floor (version effective as of January 1, 2023). For examples of the U.S. rule PD and LGD floors see 12 CFR 3.131 (OCC); 12 CFR 217.131 (FRB); and 12 CFR 324.131 (FDIC). 37 See buffer requirements at section RBC30 of the Basel Framework; 12 CFR 3.11 (OCC); 12 CFR 217.11 (FRB); and 12 CFR 324.11 (FDIC) of the U.S. rule; 12 CFR 628.11 of the FCA banks and associations capital rule; and 12 CFR 1240.11 of the FHFA capital rule. A conservation buffer is designed to ensure that banks build up capital buffers outside periods of stress which can be drawn down as losses are incurred. Under a countercyclical buffer regime, the regulator monitors credit growth and other indicators for signs of elevated system-wide risk; based on this assessment the regulator may put in place a countercyclical buffer requirement when circumstances warrant and then remove that buffer when credit risk returns to more normal levels. Other types of buffers also exist. 38 See Basel Framework section DIS10; 12 CFR 3.61–3.63 (OCC); 12 CFR 217.61–217.63 (FRB); 12 VerDate Sep<11>2014 16:51 Jan 23, 2023 Jkt 259001 4111 The nature of these disclosures varies depending on whether the entities follow the standardized or an IRB approach. Currently, as discussed above, within a Basel-based context, Farmer Mac voluntarily discloses its tier 1 ratio as calculated under the A–IRB approach, as well as its adoption of a buffer over its internal minimum tier 1 capital ratio. What disclosures, if any, should FCA consider requiring for Farmer Mac? DEPARTMENT OF TRANSPORTATION C. Leverage Ratio and Leverage Buffer AGENCY: 7. The Basel Framework requires a minimum leverage ratio (i.e., a non-riskbased ratio) of three percent.39 The U.S. rule requires a minimum leverage ratio of four percent to be considered adequately capitalized and an additional supplementary leverage ratio of three percent for A–IRB approach users.40 FCA regulations governing System banks and associations require a four percent leverage ratio with a leverage buffer of one percent.41 The FHFA capital rule requires a 2.5 percent minimum tier 1 leverage ratio plus a leverage buffer that adjusts based on the entity’s market share.42 FCA regulations do not require Farmer Mac to calculate a leverage ratio or buffer. Should FCA consider leverage ratio requirements for Farmer Mac? If so, what leverage ratio requirements should FCA consider? Should FCA consider a leverage buffer for Farmer Mac? If so, what type and structure should FCA consider? D. Other 8. What other approaches, risk categories (e.g., market risk and operations risk, including model risk), or methodologies not discussed above should FCA consider in updating its regulatory capital framework for Farmer Mac? Dated: January 17, 2023. Ashley Waldron, Secretary, Farm Credit Administration Board. [FR Doc. 2023–01042 Filed 1–23–23; 8:45 am] BILLING CODE 6705–01–P CFR 324.61–324.63 (FDIC) (U.S. rule standardized approach entities with total consolidated of $50 billion or more); 12 CFR 3.171–3.173 (OCC); 12 CFR 217.171–217.173 (FRB); 12 CFR 324.171–324.173 (FDIC) (U.S. rule A–IRB approach entities); 12 CFR 628.61–628.63 (FCA rule for System banks); 12 CFR 1240.61–1240.63 (FHFA). 39 Basel Framework at LEV20.6. 40 See 12 CFR 217.10 (FRB); 12 CFR 3.10 (OCC); 12 CFR 324.10 (FDIC). 41 See 12 CFR 628.11. 42 See 12 CFR 1240.10(f) and 12 CFR 1240.11, respectively. PO 00000 Frm 00021 Fmt 4702 Sfmt 4702 Federal Aviation Administration 14 CFR Part 39 [Docket No. FAA–2023–0022; Project Identifier MCAI–2022–00564–E] RIN 2120–AA64 Airworthiness Directives; Pratt & Whitney Canada Corporation Turboprop Engines Federal Aviation Administration (FAA), DOT. ACTION: Notice of proposed rulemaking (NPRM). The FAA proposes to adopt a new airworthiness directive (AD) for certain Pratt & Whitney Canada Corporation (P&WC) PW308A and PW308C model turbofan engines. This proposed AD was prompted by a manufacturer’s design review which identified that the combustion chamber outer case (CCOC) to rear compressor case (RCC) flange bolt low cycle fatigue life was inadequate and that those flange bolts may develop cracks resulting in flange bolt fracture. This proposed AD would require replacing all CCOC flange bolts and modifying the CCOC and inner bypass ducts. This proposed AD would also prohibit installation of certain flange bolts on any affected engine, as specified in a Transport Canada AD, which is proposed for incorporation by reference (IBR). The FAA is proposing this AD to address the unsafe condition on these products. SUMMARY: The FAA must receive comments on this NPRM by March 10, 2023. 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–2023–0022; 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 DATES: E:\FR\FM\24JAP1.SGM 24JAP1 4112 Federal Register / Vol. 88, No. 15 / Tuesday, January 24, 2023 / Proposed Rules continuing airworthiness information (MCAI), any comments received, and other information. The street address for Docket Operations is listed above. Material Incorporated by Reference: For material that is proposed for IBR in this AD, contact Transport Canada, Transport Canada National Aircraft Certification, 159 Cleopatra Drive, Nepean, Ontario K1A 0N5, Canada; phone: (888) 663–3639; email: AD-CN@ tc.gc.ca. You may find this material on the Transport Canada website at tc.canada.ca/en/aviation. • 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. FOR FURTHER INFORMATION CONTACT: Barbara Caufield, Aviation Safety Engineer, ECO Branch, FAA, 1200 District Avenue, Burlington, MA 01803; phone: (781) 238–7146; email: barbara.caufield@faa.gov. 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–2023–0022; Project Identifier MCAI–2022–00564–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. tkelley on DSK125TN23PROD with PROPOSALS 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 VerDate Sep<11>2014 16:51 Jan 23, 2023 Jkt 259001 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, ECO Branch, FAA, 1200 District Avenue, Burlington, MA 01803; phone: (781) 238–7146; email: barbara.caufield@faa.gov. 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–2022– 22, dated April 22, 2022 (referred to after this as ‘‘the MCAI’’), to correct an unsafe condition on P&WC PW308A model turbofan engines with build specification (BS) BS935 and BS1249, serial numbers PCE–CE0180 and prior, and PW308C model turbofan engines with BS1047 and BS1238, serial numbers PCE–CF0967 and prior. The MCAI states that during a design review, the manufacturer identified that the existing low cycle fatigue life of the flange bolts that secure the CCOC and the RCC is inadequate. As of May 6, 2022 (the effective date of Transport Canada AD CF–2022–22), there have been no reports of cracked flange bolts, however the MCAI states there is potential that cracks could develop on the flange bolt which could lead to fracture of the bolt. The MCAI also states that to address the potential cracking issue, P&WC introduced redesigned flange bolts made of an improved fatigue resistant material. P&WC also introduced revised procedures to modify the CCOC and the inner bypass duct flange with chamfers to reverse the installation direction of the flange bolts. The MCAI specifies installation of the redesigned bolt configuration, modifications to the COCC and inner bypass duct, and specifies an installation prohibition for flange bolts with part numbers MS9698– 08 or MS9698–09 on the affected engines. The FAA is proposing this AD to prevent cracking and fracture of the flange bolts which may result in flange separation or case rupture, 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–2023–0022. PO 00000 Frm 00022 Fmt 4702 Sfmt 4702 Related Service Information Under 1 CFR Part 51 The FAA reviewed Transport Canada AD CF–2022–22, which specifies instructions for replacing certain CCOC flange bolts and modifying the CCOC and inner bypass ducts. Transport Canada AD CF–2022–22 also specifies an installation prohibition for flange bolts with part numbers MS9698–08 and MS9698–09 on the affected engines. 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. 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 described 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 these same type designs. Proposed AD Requirements in This NPRM This proposed AD would require accomplishing the actions specified in Transport Canada AD CF–2022–22, 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.’’ 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 since coordinated with other manufacturers and CAAs to use this process. As a result, the FAA proposes to incorporate by reference Transport Canada AD CF–2022–22 in the FAA final rule. This proposed AD would, therefore, require compliance with Transport Canada AD CF–2022–22 in its entirety through that incorporation, except for any differences identified as exceptions in the regulatory text of this proposed AD. Using common terms that are the same as the heading of a particular section in the Transport Canada AD does not mean that operators need comply only with E:\FR\FM\24JAP1.SGM 24JAP1 4113 Federal Register / Vol. 88, No. 15 / Tuesday, January 24, 2023 / Proposed Rules that section. For example, where the AD requirement refers to ‘‘Compliance,’’ compliance with this AD requirement is not limited to the section titled ‘‘Corrective Actions’’ in Transport Canada AD CF–2022–22. Service information required by the Transport Canada AD for compliance will be available at regulations.gov by searching for and locating Docket No. FAA–2023– 0022 after the FAA final rule is published. reporting the information to the manufacturer. Differences Between This Proposed AD and the MCAI Costs of Compliance Where the service information referenced in Transport Canada AD CF– 2022–22 requires reporting certain information to the manufacturer, this proposed AD would not require The FAA estimates that this AD, if adopted as proposed, would affect 668 engines installed on airplanes of U.S. Registry. The FAA estimates the following costs to comply with this proposed AD: ESTIMATED COSTS Action Labor cost Remove and replace all CCOC flange bolts .. Modify the CCOC and inner bypass ducts ..... 1.5 work-hours × $85 per hour = $128 .......... 1.5 work-hours × $85 per hour = $128 .......... Authority for This Rulemaking 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. Air transportation, Aircraft, Aviation safety, Incorporation by reference, Safety. Regulatory Findings tkelley on DSK125TN23PROD with PROPOSALS Parts cost 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. VerDate Sep<11>2014 16:51 Jan 23, 2023 Jkt 259001 The Proposed Amendment Accordingly, under the authority delegated to me by the Administrator, the FAA proposes to amend 14 CFR part 39 as follows: 1. The authority citation for part 39 continues to read as follows: ■ Authority: 49 U.S.C. 106(g), 40113, 44701. [Amended] 2. The FAA amends § 39.13 by adding the following new airworthiness directive: ■ Pratt & Whitney Canada Corporation: Docket No. FAA–2023–0022; Project Identifier MCAI–2022–00564–E. (a) Comments Due Date The FAA must receive comments on this airworthiness directive (AD) by March 10, 2023. (b) Affected ADs None. (c) Applicability This AD applies to: (1) Pratt & Whitney Canada (P&WC) PW308A model turbofan engines with build specification (BS) BS935 and BS1249, serial numbers PCE–CE0180 and prior; and (2) P&WC PW308C model turbofan engines with BS1047 and BS1238, serial numbers PCE–CF0967 and prior. (d) Subject Joint Aircraft Service Component (JASC) Code 7240, Turbine Engine Combustion Section. (e) Unsafe Condition This AD was prompted by a manufacturer’s design review which identified that the PO 00000 Frm 00023 Fmt 4702 Sfmt 4702 $7,742 0 $7,870 128 Cost on U.S. operators $5,257,160 85,504 combustion chamber outer case (CCOC) to rear compressor case (RCC) flange bolts low cycle fatigue life was inadequate, and that those flange bolts may develop cracks resulting in flange bolt fracture. The FAA is issuing this AD to prevent cracking and fracture of the flange bolts. The unsafe condition, if not addressed, may result in flange bolt fracture, flange separation or case rupture, damage to the engine and damage to the airplane. (f) Compliance PART 39—AIRWORTHINESS DIRECTIVES § 39.13 Cost per product 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–2022–22. (h) Exceptions to Transport Canada AD CF– 2022–22 Where Transport Canada AD CF–2022–22 requires compliance from its effective date, this AD requires using the effective date of this AD. (i) No Reporting Requirement Although the service information referenced in Transport Canada AD CF– 2022–22 specifies to submit certain information to the manufacturer, this AD does not include that requirement. (j) 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 § 39.19. In accordance with § 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 (k) of this AD or email 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\24JAP1.SGM 24JAP1 4114 Federal Register / Vol. 88, No. 15 / Tuesday, January 24, 2023 / Proposed Rules 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, ECO Branch, FAA, 1200 District Avenue, Burlington, MA 01803; phone: (781) 238–7146; email: barbara.caufield@faa.gov. (l) 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–2022–22, dated April 22, 2022. (ii) [Reserved] (3) For Transport Canada AD CF–2022–22, contact Transport Canada, Transport Canada National Aircraft Certification, 159 Cleopatra Drive, Nepean, Ontario K1A 0N5, Canada; phone: (888) 663–3639; email: AD-CN@ tc.gc.ca; 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 service information that is incorporated by reference at the National Archives and Records Administration (NARA). For information on the availability of this material at NARA, email: fr.inspection@nara.gov, or go to: www.archives.gov/federal-register/cfr/ibrlocations.html. Issued on January 17, 2023. Christina Underwood, Acting Director, Compliance & Airworthiness Division, Aircraft Certification Service. [FR Doc. 2023–01148 Filed 1–23–23; 8:45 am] BILLING CODE 4910–13–P DEPARTMENT OF TRANSPORTATION Federal Aviation Administration 14 CFR Part 39 [Docket No. FAA–2023–0023; Project Identifier MCAI–2022–01030–T] RIN 2120–AA64 Airworthiness Directives; Airbus SAS Airplanes Federal Aviation Administration (FAA), DOT. ACTION: Notice of proposed rulemaking (NPRM). tkelley on DSK125TN23PROD with PROPOSALS AGENCY: The FAA proposes to supersede Airworthiness Directive (AD) 2021–08–08, which applies to all Airbus SAS Model A350–941 and –1041 airplanes. AD 2021–08–08 requires SUMMARY: VerDate Sep<11>2014 16:51 Jan 23, 2023 Jkt 259001 replacing affected bleed duct assemblies and bleed gimbals at the wing-to-pylon interface, and prohibits the installation of affected parts. This AD was prompted by a report of a welding quality issue in the gimbal joint of the air bleed duct at each wing-to-pylon interface and the consequent deformation of the gimbal inner ring, and by new findings that affected bleed gimbals were found on certain airplanes that did not have any maintenance record of affected part replacement. This proposed AD would continue to require the actions in AD 2021–08–08 and, for certain airplanes, would require inspection of the bleed gimbals to determine the part number and replacement if necessary, as specified in a European Union Aviation Safety Agency (EASA) AD, which is proposed for incorporation by reference. The FAA is proposing this AD to address the unsafe condition on these products. The FAA must receive comments on this proposed AD by March 10, 2023. 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–2023–0023; 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. Material Incorporated by Reference: • For material that will be incorporated by reference (IBR) in this AD, contact EASA, Konrad-AdenauerUfer 3, 50668 Cologne, Germany; telephone +49 221 8999 000; email ADs@easa.europa.eu; website easa.europa.eu. You may find this material on the EASA website at ad.easa.europa.eu. • You may view this service information at the FAA, Airworthiness Products Section, Operational Safety Branch, 2200 South 216th St., Des DATES: PO 00000 Frm 00024 Fmt 4702 Sfmt 4702 Moines, WA. For information on the availability of this material at the FAA, call 206–231–3195. FOR FURTHER INFORMATION CONTACT: Dat Le, Aerospace Engineer, Large Aircraft Section, FAA, International Validation Branch, 2200 South 216th St., Des Moines, WA 98198; telephone 516–228– 7317; email dat.v.le@faa.gov. 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–2023–0023; Project Identifier MCAI–2022–01030–T’’ 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 Dat Le, Aerospace Engineer, Large Aircraft Section, FAA, International Validation Branch, 2200 South 216th St., Des Moines, WA 98198; telephone 516–228–7317; email dat.v.le@faa.gov. Any commentary that the FAA receives which is not specifically designated as CBI will be E:\FR\FM\24JAP1.SGM 24JAP1

Agencies

[Federal Register Volume 88, Number 15 (Tuesday, January 24, 2023)]
[Proposed Rules]
[Pages 4111-4114]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 2023-01148]


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DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2023-0022; Project Identifier MCAI-2022-00564-E]
RIN 2120-AA64


Airworthiness Directives; Pratt & Whitney Canada Corporation 
Turboprop 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 Corporation (P&WC) PW308A and PW308C 
model turbofan engines. This proposed AD was prompted by a 
manufacturer's design review which identified that the combustion 
chamber outer case (CCOC) to rear compressor case (RCC) flange bolt low 
cycle fatigue life was inadequate and that those flange bolts may 
develop cracks resulting in flange bolt fracture. This proposed AD 
would require replacing all CCOC flange bolts and modifying the CCOC 
and inner bypass ducts. This proposed AD would also prohibit 
installation of certain flange bolts on any affected engine, as 
specified in a Transport Canada AD, which is proposed for incorporation 
by reference (IBR). The FAA is proposing this AD to address the unsafe 
condition on these products.

DATES: The FAA must receive comments on this NPRM by March 10, 2023.

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-2023-0022; 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

[[Page 4112]]

continuing airworthiness information (MCAI), any comments received, and 
other information. The street address for Docket Operations is listed 
above.
    Material Incorporated by Reference:
    For material that is proposed for IBR 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]. You may find this material on the Transport Canada 
website at tc.canada.ca/en/aviation.
     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.

FOR FURTHER INFORMATION CONTACT: Barbara Caufield, Aviation Safety 
Engineer, ECO Branch, FAA, 1200 District Avenue, Burlington, MA 01803; 
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-2023-0022; Project Identifier 
MCAI-2022-00564-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, ECO Branch, FAA, 1200 
District Avenue, Burlington, MA 01803; phone: (781) 238-7146; email: 
[email protected]. 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-2022-22, dated April 22, 2022 (referred 
to after this as ``the MCAI''), to correct an unsafe condition on P&WC 
PW308A model turbofan engines with build specification (BS) BS935 and 
BS1249, serial numbers PCE-CE0180 and prior, and PW308C model turbofan 
engines with BS1047 and BS1238, serial numbers PCE-CF0967 and prior. 
The MCAI states that during a design review, the manufacturer 
identified that the existing low cycle fatigue life of the flange bolts 
that secure the CCOC and the RCC is inadequate. As of May 6, 2022 (the 
effective date of Transport Canada AD CF-2022-22), there have been no 
reports of cracked flange bolts, however the MCAI states there is 
potential that cracks could develop on the flange bolt which could lead 
to fracture of the bolt. The MCAI also states that to address the 
potential cracking issue, P&WC introduced redesigned flange bolts made 
of an improved fatigue resistant material. P&WC also introduced revised 
procedures to modify the CCOC and the inner bypass duct flange with 
chamfers to reverse the installation direction of the flange bolts. The 
MCAI specifies installation of the redesigned bolt configuration, 
modifications to the COCC and inner bypass duct, and specifies an 
installation prohibition for flange bolts with part numbers MS9698-08 
or MS9698-09 on the affected engines. The FAA is proposing this AD to 
prevent cracking and fracture of the flange bolts which may result in 
flange separation or case rupture, 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-2023-0022.

Related Service Information Under 1 CFR Part 51

    The FAA reviewed Transport Canada AD CF-2022-22, which specifies 
instructions for replacing certain CCOC flange bolts and modifying the 
CCOC and inner bypass ducts. Transport Canada AD CF-2022-22 also 
specifies an installation prohibition for flange bolts with part 
numbers MS9698-08 and MS9698-09 on the affected engines.
    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.

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 described 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 these same type designs.

Proposed AD Requirements in This NPRM

    This proposed AD would require accomplishing the actions specified 
in Transport Canada AD CF-2022-22, 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.''

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 since 
coordinated with other manufacturers and CAAs to use this process. As a 
result, the FAA proposes to incorporate by reference Transport Canada 
AD CF-2022-22 in the FAA final rule. This proposed AD would, therefore, 
require compliance with Transport Canada AD CF-2022-22 in its entirety 
through that incorporation, except for any differences identified as 
exceptions in the regulatory text of this proposed AD. Using common 
terms that are the same as the heading of a particular section in the 
Transport Canada AD does not mean that operators need comply only with

[[Page 4113]]

that section. For example, where the AD requirement refers to 
``Compliance,'' compliance with this AD requirement is not limited to 
the section titled ``Corrective Actions'' in Transport Canada AD CF-
2022-22. Service information required by the Transport Canada AD for 
compliance will be available at regulations.gov by searching for and 
locating Docket No. FAA-2023-0022 after the FAA final rule is 
published.

Differences Between This Proposed AD and the MCAI

    Where the service information referenced in Transport Canada AD CF-
2022-22 requires reporting certain information to the manufacturer, 
this proposed AD would not require reporting the information to the 
manufacturer.

Costs of Compliance

    The FAA estimates that this AD, if adopted as proposed, would 
affect 668 engines installed on airplanes of U.S. Registry.
    The FAA estimates the following costs to comply with this proposed 
AD:

                                                 Estimated Costs
----------------------------------------------------------------------------------------------------------------
                                                                                     Cost per      Cost on U.S.
                Action                         Labor cost           Parts cost        product        operators
----------------------------------------------------------------------------------------------------------------
Remove and replace all CCOC flange      1.5 work-hours x $85 per          $7,742          $7,870      $5,257,160
 bolts.                                  hour = $128.
Modify the CCOC and inner bypass ducts  1.5 work-hours x $85 per               0             128          85,504
                                         hour = $128.
----------------------------------------------------------------------------------------------------------------

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 Corporation: Docket No. FAA-2023-0022; 
Project Identifier MCAI-2022-00564-E.

(a) Comments Due Date

    The FAA must receive comments on this airworthiness directive 
(AD) by March 10, 2023.

(b) Affected ADs

    None.

(c) Applicability

    This AD applies to:
    (1) Pratt & Whitney Canada (P&WC) PW308A model turbofan engines 
with build specification (BS) BS935 and BS1249, serial numbers PCE-
CE0180 and prior; and
    (2) P&WC PW308C model turbofan engines with BS1047 and BS1238, 
serial numbers PCE-CF0967 and prior.

(d) Subject

    Joint Aircraft Service Component (JASC) Code 7240, Turbine 
Engine Combustion Section.

(e) Unsafe Condition

    This AD was prompted by a manufacturer's design review which 
identified that the combustion chamber outer case (CCOC) to rear 
compressor case (RCC) flange bolts low cycle fatigue life was 
inadequate, and that those flange bolts may develop cracks resulting 
in flange bolt fracture. The FAA is issuing this AD to prevent 
cracking and fracture of the flange bolts. The unsafe condition, if 
not addressed, may result in flange bolt fracture, flange separation 
or case rupture, 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-2022-22.

(h) Exceptions to Transport Canada AD CF-2022-22

    Where Transport Canada AD CF-2022-22 requires compliance from 
its effective date, this AD requires using the effective date of 
this AD.

(i) No Reporting Requirement

    Although the service information referenced in Transport Canada 
AD CF-2022-22 specifies to submit certain information to the 
manufacturer, this AD does not include that requirement.

(j) 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 Sec.  
39.19. In accordance with Sec.  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 (k) of this AD or email to: [email protected].
    (2) Before using any approved AMOC, notify your appropriate 
principal inspector, or lacking a principal inspector, the manager

[[Page 4114]]

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, ECO Branch, FAA, 1200 District Avenue, 
Burlington, MA 01803; phone: (781) 238-7146; email: 
[email protected].

(l) 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-2022-22, dated April 22, 2022.
    (ii) [Reserved]
    (3) For Transport Canada AD CF-2022-22, 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 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 service information that is incorporated 
by reference at the National Archives and Records Administration 
(NARA). For information on the availability of this material at 
NARA, email: [email protected], or go to: www.archives.gov/federal-register/cfr/ibr-locations.html.

    Issued on January 17, 2023.
Christina Underwood,
Acting Director, Compliance & Airworthiness Division, Aircraft 
Certification Service.
[FR Doc. 2023-01148 Filed 1-23-23; 8:45 am]
BILLING CODE 4910-13-P
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