Airworthiness Directives; British Aerospace (Operations) Limited and British Aerospace Regional Aircraft Airplanes, 17211-17215 [2022-06428]

Download as PDF Federal Register / Vol. 87, No. 59 / Monday, March 28, 2022 / Proposed Rules 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 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: a. Removing Airworthiness Directive 2021–15–01, Amendment 39–21648 (86 FR 36487, July 12, 2021); and ■ b. Adding the following new airworthiness directive: ■ ■ jspears on DSK121TN23PROD with PROPOSALS1 Rolls-Royce Deutschland Ltd & Co KG (Type Certificate previously held by RollsRoyce plc): Docket No. FAA–2022–0296; Project Identifier MCAI–2021–01064–E. (a) Comments Due Date The FAA must receive comments on this airworthiness directive (AD) action by May 12, 2022. (b) Affected ADs This AD replaces AD 2021–15–01, Amendment 39–21648 (86 FR 36487, July 12, 2021). VerDate Sep<11>2014 16:45 Mar 25, 2022 Jkt 256001 (c) Applicability This AD applies to Rolls-Royce Deutschland Ltd & Co KG Trent XWB–75, Trent XWB–79, Trent XWB–79B, Trent XWB–84, and Trent XWB–97 model turbofan engines. (d) Subject Joint Aircraft System Component (JASC) Code 7200, Engine Turbine/Turboprop. (e) Unsafe Condition This AD was prompted by the manufacturer revising the time limits manual (TLM) to incorporate revised life limits and updated mandatory inspection intervals of certain critical rotating parts. The FAA is issuing this AD to prevent the failure of critical rotating parts. The unsafe condition, if not addressed, could result in failure of one or more engines, loss of thrust control, 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 paragraph (h) of this AD: Perform all required actions within the compliance times specified in, and in accordance with, European Union Aviation Safety Agency (EASA) AD 2021–0217. (h) Exceptions to EASA AD 2021–0217 (1) Where EASA AD 2021–0217 defines the AMP as the approved Aircraft Maintenance Programme on the basis of which the operator or the owner ensures the continuing airworthiness of each operated engine, this AD defines the AMP as the Aircraft Maintenance Program on the basis of which the operator or the owner ensures the continuing airworthiness of each operated airplane. (2) Where EASA AD 2021–0217 requires revising the approved aircraft maintenance program (AMP) within 12 months after the effective date of EASA AD 2021–0217, this AD requires revising the approved AMP and airworthiness limitations section (ALS) within 120 days after the effective date of this AD. (3) This AD does not require compliance with paragraph (1), Mandatory Inspections and Replacement of Life Limited Parts, of EASA AD 2021–0217. (4) This AD does not require compliance with paragraph (2), Corrective Action(s), of EASA AD 2021–0217. (5) This AD does not require compliance with paragraph (4), Credit, of EASA AD 2021–0217. (6) This AD does not require compliance with paragraph (5), Recording AD Compliance, of EASA AD 2021–0217. (7) This AD does not require compliance with the ‘‘Remarks’’ section of EASA AD 2021–0217. (i) Alternative Methods of Compliance (AMOCs) (1) The Manager, ECO Branch, FAA, has the authority to approve AMOCs for this AD, if requested using the procedures found in 14 CFR 39.19. In accordance with 14 CFR 39.19, PO 00000 Frm 00014 Fmt 4702 Sfmt 4702 17211 send your request to your principal inspector or local Flight Standards District Office, as appropriate. If sending information directly to the manager of the certification office, send it to the attention of the person identified in paragraph (j)(2) of this AD and 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 of the local flight standards district office/ certificate holding district office. (j) Related Information (1) For more information about EASA AD 2021–0217, contact EASA, KonradAdenauer-Ufer 3, 50668 Cologne, Germany; phone: +49 221 8999 000; email: ADs@ easa.europa.eu. You may find this material on the EASA website at https:// ad.easa.europa.eu. 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. This material may be found in the AD docket at https://www.regulations.gov by searching for and locating Docket No. FAA–2022–0296. (2) For more information about this AD, contact Nicholas Paine, Aviation Safety Engineer, ECO Branch, FAA, 1200 District Avenue, Burlington, MA 01803; phone: (781) 238–7116; email: nicholas.j.paine@faa.gov. (3) For service information identified in this AD, contact Rolls-Royce plc, Corporate Communications, P.O. Box 31, Derby, DE24 8BJ, United Kingdom; phone: +44 (0)1332 242424; fax: +44 (0)1332 249936; website: https://www.rolls-royce.com/contact-us.aspx. You may view this referenced 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. Issued on March 22, 2022. Lance T. Gant, Director, Compliance & Airworthiness Division, Aircraft Certification Service. [FR Doc. 2022–06409 Filed 3–25–22; 8:45 am] BILLING CODE 4910–13–P DEPARTMENT OF TRANSPORTATION Federal Aviation Administration 14 CFR Part 39 [Docket No. FAA–2022–0291; Project Identifier MCAI–2021–01321–A] RIN 2120–AA64 Airworthiness Directives; British Aerospace (Operations) Limited and British Aerospace Regional Aircraft Airplanes Federal Aviation Administration (FAA), DOT. ACTION: Notice of proposed rulemaking (NPRM). AGENCY: E:\FR\FM\28MRP1.SGM 28MRP1 17212 Federal Register / Vol. 87, No. 59 / Monday, March 28, 2022 / Proposed Rules The FAA proposes to supersede Airworthiness Directive (AD) 2017–15–06, which applies to British Aerospace Regional Aircraft Model HP.137 Jetstream Mk.1, Jetstream Series 200 and 3101, and Jetstream Model 3201 airplanes. AD 2017–15–06 requires repetitively inspecting the main landing gear (MLG) for cracks and, if cracks are found, replacing the MLG with an airworthy part. Since the FAA issued AD 2017–15–06, the Civil Aviation Authority (CAA) of the United Kingdom superseded the mandatory continuing airworthiness information (MCAI) issued by the European Aviation Safety Agency (EASA) to correct an unsafe condition on these products. This proposed AD would retain the initial inspection and the calculation of hours time-in-service to flight cycle (FC) actions required by AD 2017–15–06, but would decrease the repetitive inspection interval time from 1,200 flight cycles to 900 flight cycles. 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 May 12, 2022. 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 https://www.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. For British Aerospace service information identified in this NPRM, contact BAE Systems (Operations) Ltd., Customer Information Department, Prestwick International Airport, Ayrshire, KA9 2RW, United Kingdom; phone: +44 3300 488727; fax: +44 1292 675704; email: RApublications@ baesystems.com; website: https:// www.baesystems.com/Businesses/ RegionalAircraft/. For He´roux Devtek service information identified in this NPRM, contact He´roux Devtek Product Support, 8, Pembroke Court, Manor Park, Runcorn, Cheshire, WA7 1TG, United Kingdom; phone: (855) 679– 5450; email: technical_support@ herouxdevtek.com; website: https:// www.herouxdevtek.com/en/contact-us. You may view this service information at the Airworthiness Products Section, Operational Safety Branch, FAA, 901 jspears on DSK121TN23PROD with PROPOSALS1 SUMMARY: VerDate Sep<11>2014 16:45 Mar 25, 2022 Jkt 256001 Locust, Kansas City, MO 64106. For information on the availability of this material at the FAA, call (817) 222– 5110. Examining the AD Docket You may examine the AD docket at https://www.regulations.gov by searching for and locating Docket No. FAA–2022–0291; 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 MCAI, any comments received, and other information. The street address for Docket Operations is listed above. FOR FURTHER INFORMATION CONTACT: Doug Rudolph, Aviation Safety Engineer, General Aviation & Rotorcraft Section, International Validation Branch, FAA, 901 Locust, Room 301, Kansas City, MO 64106; phone: (816) 329–4059; email: doug.rudolph@ 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–2022–0291; Project Identifier MCAI–2021–01321–A’’ 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 the 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 https:// www.regulations.gov, including any personal information you provide. The agency will also post a report summarizing each substantive verbal contact received about this proposed AD. 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 PO 00000 Frm 00015 Fmt 4702 Sfmt 4702 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 Doug Rudolph, Aviation Safety Engineer, General Aviation & Rotorcraft Section, International Validation Branch, FAA, 901 Locust, Room 301, Kansas City, MO 64106. Any commentary that the FAA receives which is not specifically designated as CBI will be placed in the public docket for this rulemaking. Background The FAA issued AD 2017–15–06, Amendment 39–18966 (82 FR 34846, July 27, 2017) (AD 2017–15–06), for British Aerospace Regional Aircraft Model HP.137 Jetstream Mk.1, Jetstream Series 200 and 3101, and Jetstream Model 3201 airplanes. AD 2017–15–06 was prompted by MCAI originated by EASA, which is the Technical Agent for the Member States of the European Union. EASA issued EASA AD 2017– 0053, dated March 24, 2017, to correct an unsafe condition identified as cracks in the MLG fitting at the pintle to cylinder interface, which could cause failure of the MLG. AD 2017–15–06 requires repetitively inspecting the MLG and, if cracks are found, replacing the MLG with an airworthy part. The FAA issued AD 2017–15–06 to detect and correct cracks in the MLG, which could lead to structural failure of the MLG and result in loss of control during takeoffs and landings. Actions Since AD 2017–15–06 Was Issued Since the FAA issued AD 2017–15– 06, the CAA superseded EASA AD 2017–0053, dated March 24, 2017, and issued CAA AD G–2021–0015 dated November 24, 2021 (referred to after this as ‘‘the MCAI’’). The MCAI states: Cracks were found during early fatigue testing and in service on the main landing gear (MLG) main fitting at the pintle to cylinder interface. This condition if not detected and corrected, could lead to structural failure of the MLG, possibly resulting in loss of control of the aeroplane during take-off or landing runs. To address this unsafe condition, BAE Systems (Operations) Ltd published several Service Bulletins (ISB) which, in 1996, were consolidated into a single bulletin, SB 32– JA960142, to provide instructions for inspection. CAA issued AD 005–03–96 E:\FR\FM\28MRP1.SGM 28MRP1 Federal Register / Vol. 87, No. 59 / Monday, March 28, 2022 / Proposed Rules accordingly to require repetitive inspections of the MLG. In 2014 a crack was found which was below the critical crack length, but unusually large compared to similar cracks previously found in service. Further investigation into the subject determined that the existing inspection intervals remain valid but also showed that the assumed detectable defect size of a 1.27mm [millimeters] (0.05 in) [inch] crack could not be guaranteed using the then defined accomplishment instructions for a high frequency eddy current (HFEC) or fluorescent dye penetrant (FDP) inspection. Consequently, BAE Systems (Operations) Ltd issued SB 32–JA960142 Revision 4, which provided an improved procedure for HFEC and FDP inspection to ensure the detection of cracks of 1.27 mm (0.05 in) length. In response to this revision, EASA issued AD 2017–0053 (corrected 24 March 2017) addressing the need for revised inspection procedures. Recently, an operator performing [EASA] AD 2017–0053 (referencing SB 32–JA960142 rev 4) identified 3 crack indications (13 mm, 3 mm & 8 mm) in close proximity, the total length of which was approximately 38 mm. This was an unusual report based of reported findings over the 24 years since the SB was initially released. In depth laboratory investigation of the discrepant part was undertaken, which found that the material was to specification and the cracks were fatigue in nature. The investigation was unable to establish a reason for the cracks being different in nature to those previously reported. In response, a further damage tolerance analysis was performed, which identified the need to reduce the repeat inspection interval defined in [EASA] AD 2017–0053. That is, a reduction from a repeat of 1,200 flight cycles (FC) to a repeat of 900 FC. For the reasons described above, this [CAA] AD retains the requirements of CAA UK AD 005–03–96 (superseded by EASA AD) and EASA AD 2017–0053 (superseded by this CAA AD) and requires the accomplishment of repetitive inspections in accordance with new repetitive inspection requirements. You may examine the MCAI in the AD docket at https:// www.regulations.gov by searching for and locating Docket No. FAA–2022– 0291. 17213 Related Service Information Under 1 CFR Part 51 Proposed AD Requirements in This NPRM The FAA reviewed British Aerospace Jetstream Series 3100 & 3200 Service Bulletin 32–JA960142, Revision 5, dated December 13, 2019. This service information specifies procedures for doing a fluorescent penetrant inspection for cracks in the MLG. Alternatively, this service information specifies conducting an eddy current inspection for cracks in the MLG in accordance with He´roux Devtek Service Bulletin No. 32–56, Revision 4, dated August 16, 2016, which was incorporated by reference as of August 31, 2017 (82 FR 34846). 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. This proposed AD would retain the initial inspection, the calculation of hours time-in-service to flight cycle (FC) action, and replacement as necessary required by AD 2017–15–06, but would decrease the repetitive inspection interval time from 1,200 flight cycles to 900 flight cycles. Other Related Service Information The FAA reviewed British Aerospace Jetstream Series 3100 & 3200 Service Bulletin 32–JA960142, Revision 4, dated October 21, 2016. This service information specifies procedures for doing a fluorescent penetrant inspection for cracks in the MLG. Alternatively, this service information specifies conducting an eddy current inspection for cracks in the MLG in accordance with He´roux Devtek Service Bulletin No. 32–56, Revision 4, dated August 16, 2016. This service information also specifies corrective actions if any crack found exceeds a certain length. FAA’s Determination This product has been approved by the aviation authority of another country and is 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 and service information referenced above. The FAA is issuing this NPRM after determining the unsafe condition described previously is likely to exist or develop on other products of the same type design. Differences Between This Proposed AD and the MCAI The MCAI does not apply to the Model HP.137 Jetstream Mk.1 or Model Jetstream Series 200, whereas this proposed AD would include those models because they have an FAA type certificate and share a similar type design in the affected area. The MCAI and service information apply to Model Jetstream Series 3100 and Jetstream Series 3200 airplanes, which are identified on the FAA type certificates as Jetstream Model 3101 and Jetstream Model 3201 airplanes, respectively. The MCAI gives credit for inspections and corrective actions accomplished before the effective date of the MCAI using BAE Systems (Operations) Ltd SB 32–JA960142 Revision 5, Revision 4, or Revision 3. This proposed AD would not give credit for Revision 3, as AD 2017–15–06 did not provide credit and the FAA did not receive any requests to use Revision 3 as an alternative method of compliance. The MCAI requires compliance with all of the accomplishment instructions in the service information, which includes reporting the inspection results (if there is a crack) to the manufacturer. This proposed AD would not require reporting information to the manufacturer. Costs of Compliance The FAA estimates that this AD, if adopted as proposed, would affect 18 airplanes of U.S. registry. The FAA estimates the following costs to comply with this proposed AD: ESTIMATED COSTS jspears on DSK121TN23PROD with PROPOSALS1 Action Inspection ............................... 6 work-hours × $85 per hour = $510. The FAA estimates the following costs to replace the MLG based on the VerDate Sep<11>2014 16:45 Mar 25, 2022 Parts cost Cost per airplane Not applicable ........................ $510 Labor cost Jkt 256001 results of the proposed inspection. The FAA has no way of determining the PO 00000 Frm 00016 Fmt 4702 Sfmt 4702 Cost on U.S. operators $9,180 per inspection cycle. number of airplanes that might need this replacement: E:\FR\FM\28MRP1.SGM 28MRP1 17214 Federal Register / Vol. 87, No. 59 / Monday, March 28, 2022 / Proposed Rules ON-CONDITION COSTS Action Labor cost Replace the MLG ......................................................... 1 work-hour × $85 per hour = $85 ............................... 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 that the 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. jspears on DSK121TN23PROD with PROPOSALS1 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: VerDate Sep<11>2014 17:34 Mar 25, 2022 Jkt 256001 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: a. Removing Airworthiness Directive 2017–15–06, Amendment 39–18966 (82 FR 34846, July 27, 2017); and ■ b. Adding the following new airworthiness directive: ■ ■ British Aerospace (Operations) Limited and British Aerospace Regional Aircraft: Docket No. FAA–2022–0291; Project Identifier MCAI–2021–01321–A. (a) Comments Due Date The FAA must receive comments on this airworthiness directive (AD) by May 12, 2022. (b) Affected ADs This AD replaces AD 2017–15–06, Amendment 39–18966 (82 FR 34846, July 27, 2017) (AD 2017–15–06). (c) Applicability This AD applies to British Aerospace (Operations) Limited Model HP.137 Jetstream Mk.1, Jetstream Series 200, and Jetstream Model 3101 airplanes and British Aerospace Regional Aircraft Model Jetstream Model 3201 airplanes, all serial numbers, certificated in any category. (d) Subject Joint Aircraft System Component (JASC) Code 3211, Main Landing Gear Attach Section. (e) Unsafe Condition This AD was prompted by cracks found on the main landing gear (MLG) main fitting at the pintle to cylinder interface. The FAA is issuing this AD to detect and correct cracks in the MLG. The unsafe condition, if not addressed, could cause failure of the MLG, which could result in loss of control of the airplane during takeoffs and landings. (f) Compliance Comply with this AD within the compliance times specified, unless already done. (g) Actions (1) Within the compliance times listed in paragraph (g)(1)(i) or (ii) of this AD, as applicable, inspect the MLG for cracks by following Appendix 1, sections A through G, of British Aerospace Jetstream Series 3100 & 3200 Service Bulletin 32–JA960142, Revision 5, dated December 13, 2019; or the PO 00000 Frm 00017 Fmt 4702 Sfmt 4702 Parts cost $5,000 Cost per airplane $1,530 Accomplishment Instructions, sections A through D(6), in He´roux Devtek Service Bulletin 32–56, Revision 4, dated August 16, 2016. (i) For airplanes that have been inspected in accordance with AD 2017–15–06: Before the MLG accumulates 900 flight cycles since the last inspection or within 150 flight cycles after the effective date of this AD, whichever occurs later, and thereafter at intervals not to exceed 900 flight cycles. (ii) For airplanes that have not been inspected in accordance with AD 2017–15– 06: Before the MLG accumulates 8,000 flight cycles since first installation on an airplane or within 50 flight cycles after the effective date of this AD, whichever occurs later, and thereafter at intervals not to exceed 900 flight cycles. (2) If any crack is found during any inspection required by paragraph (g)(1) of this AD, before further flight, replace the MLG with an airworthy MLG and continue the inspections as required by paragraph (g)(1) of this AD. (3) The compliance times in paragraphs (g)(1)(i) and (ii) of this AD are presented in flight cycles (landings). If the number of total flight cycles is unknown, for purposes of this AD, the number of flight cycles is the hours time-in-service (TIS) accumulated on the airplane multiplied by 0.75. For example: (i) 100 hours TIS × 0.75 = 75 flight cycles. (ii) 1,000 hours TIS × 0.75 = 750 flight cycles. (h) 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 certification office, send it to the attention of the person identified in paragraph (i)(1) of this AD and email to: 9-AVS-AIR-730-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. (i) Related Information (1) For more information about this AD, contact Doug Rudolph, Aviation Safety Engineer, General Aviation & Rotorcraft Section, International Validation Branch, FAA, 901 Locust, Room 301, Kansas City, MO 64106; phone: (816) 329–4059; email: doug.rudolph@faa.gov. (2) Refer to Civil Aviation Authority (CAA) AD G–2021–0015, dated November 24, 2021, for more information. You may examine the CAA AD in the AD docket at E:\FR\FM\28MRP1.SGM 28MRP1 Federal Register / Vol. 87, No. 59 / Monday, March 28, 2022 / Proposed Rules https:www.regulations.gov by searching for and locating Docket No. FAA–2022–0291. (3) For British Aerospace service information identified in this AD, contact BAE Systems (Operations) Ltd., Customer Information Department, Prestwick International Airport, Ayrshire, KA9 2RW, United Kingdom; phone: +44 3300 488727; fax: +44 1292 675704; email: RApublications@baesystems.com; website: https://www.baesystems.com/Businesses/ RegionalAircraft/. For He´roux Devtek service information identified in this AD, contact He´roux Devtek Product Support, 8, Pembroke Court, Manor Park, Runcorn, Cheshire, WA7 1TG, United Kingdom; phone: (855) 679– 5450; email: technical_support@ herouxdevtek.com; website: https:// www.herouxdevtek.com/en/contact-us. You may view this service information at the Airworthiness Products Section, Operational Safety Branch, FAA, 901 Locust, Kansas City, MO 64106. For information on the availability of this material at the FAA, call (817) 222–5110. Issued on March 22, 2022. Lance T. Gant, Director, Compliance & Airworthiness Division, Aircraft Certification Service. [FR Doc. 2022–06428 Filed 3–25–22; 8:45 am] BILLING CODE 4910–13–P DEPARTMENT OF TRANSPORTATION Office of the Secretary 14 CFR Part 382 [Docket No. DOT–OST–2021–0137] RIN 2105–AE89 Accessible Lavatories on Single-Aisle Aircraft: Part 2 Office of the Secretary (OST), U.S. Department of Transportation (DOT). ACTION: Notice of proposed rulemaking. AGENCY: The U.S. Department of Transportation (Department or DOT) proposes in this notice of proposed rulemaking (NPRM) to require airlines to ensure that at least one lavatory on new single-aisle aircraft with 125 or more passenger seats is large enough to permit a passenger with a disability (with the help of an assistant, if necessary) to approach, enter, and maneuver within the aircraft lavatory, as necessary, to use all lavatory facilities and leave by means of the aircraft’s onboard wheelchair. DATES: Comments should be filed by May 27, 2022. Late-filed comments will be considered to the extent practicable. ADDRESSES: You may file comments identified by docket number DOT–OST– 2021–0137 by any of the following methods: jspears on DSK121TN23PROD with PROPOSALS1 SUMMARY: VerDate Sep<11>2014 16:45 Mar 25, 2022 Jkt 256001 • Federal eRulemaking Portal: Go to https://www.regulations.gov and follow the online instructions for submitting comments. • Mail: Docket Management Facility, U.S. Department of Transportation, 1200 New Jersey Ave. SE, West Building Ground Floor, Room W12–140, Washington, DC 20590–0001. • Hand Delivery or Courier: West Building Ground Floor, Room W12–140, 1200 New Jersey Ave. SE, between 9:00 a.m. and 5:00 p.m. ET, Monday through Friday, except Federal holidays. • Fax: (202) 493–2251. Instructions: You must include the agency name and docket number DOT– OST–2021–0137 or the Regulation Identifier Number (RIN) for the rulemaking at the beginning of your comment. All comments received will be posted without change to https:// www.regulations.gov, including any personal information provided. Confidential Business Information (CBI): 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’’ to indicate that it contains proprietary information. DOT will treat such marked submissions as confidential under the Freedom of Information Act (FOIA), and they will not be placed in the public docket of this NPRM. Submissions containing CBI should be sent to Robert Gorman, Senior Trial Attorney, Office of Aviation Consumer Protection, U.S. Department of Transportation, 1200 New Jersey Ave. SE, Washington, DC 20590, robert.gorman@dot.gov (email). Any commentary that DOT receives which is not specifically designated as CBI will be placed in the public docket for this rulemaking. Privacy Act: Anyone can search the electronic form of all comments received in any of our dockets by the name of the individual submitting the comment (or signing the comment, if submitted on behalf of an association, business, labor union, etc.). You may review DOT’s complete Privacy Act statement in the Federal Register published on April 11, 2000 (65 FR 19477–78), or you may visit https:// www.transportation.gov/privacy. PO 00000 Frm 00018 Fmt 4702 Sfmt 4702 17215 Docket: For access to the docket to read background documents or comments received, go to https:// www.regulations.gov, or to the street address listed above. Follow the online instructions for accessing the dockets. FOR FURTHER INFORMATION CONTACT: Robert Gorman, Senior Trial Attorney, Office of Aviation Consumer Protection, U.S. Department of Transportation, 1200 New Jersey Ave. SE, Washington, DC 20590, 202–366–9342, 202–366–7152 (fax), robert.gorman@dot.gov (email). You may also contact Blane Workie, Assistant General Counsel, Office of Aviation Consumer Protection, U.S. Department of Transportation, 1200 New Jersey Ave. SE, Washington, DC 20590, 202–366–9342, 202–366–7152 (fax), blane.workie@dot.gov. SUPPLEMENTARY INFORMATION: I. Background Like all individuals, those with disabilities rely on transportation for all aspects of their lives. Transportation connects individuals to jobs and services, and it opens the door to opportunity. The Department is committed to removing transportation barriers that exist for people with disabilities. This includes challenges posed by inaccessible lavatories on single-aisle aircraft. The following proposed rule is the result of a negotiated rulemaking in 2016 that was produced through the consensus of multiple disability organizations, a wide variety of aviation industry members, and other stakeholders. As we explain below, the Department made a commitment to the stakeholders that if they reached consensus on the terms of a rulemaking, the Department would act in good faith to issue a proposed rule that reflects those terms as closely as possible. This NPRM is the product of the Department’s commitment to stakeholders during that process. At the same time that DOT honors its past commitments, the Department also recognizes that it is the affirmative responsibility of the Federal Government to advance equity, civil rights, and equal opportunity for all individuals, including individuals with disabilities.1 The Department has concerns that the considerable length of time that this NPRM proposes to allow for much-needed accessibility improvements may not advance equity, civil rights or equal opportunity for persons with disabilities quickly enough. Over 25 million Americans have mobility issues that may require 1 See Executive Order 13985 (January 20, 2021), Section 1. E:\FR\FM\28MRP1.SGM 28MRP1

Agencies

[Federal Register Volume 87, Number 59 (Monday, March 28, 2022)]
[Proposed Rules]
[Pages 17211-17215]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 2022-06428]


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DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2022-0291; Project Identifier MCAI-2021-01321-A]
RIN 2120-AA64


Airworthiness Directives; British Aerospace (Operations) Limited 
and British Aerospace Regional Aircraft Airplanes

AGENCY: Federal Aviation Administration (FAA), DOT.

ACTION: Notice of proposed rulemaking (NPRM).

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

[[Page 17212]]

SUMMARY: The FAA proposes to supersede Airworthiness Directive (AD) 
2017-15-06, which applies to British Aerospace Regional Aircraft Model 
HP.137 Jetstream Mk.1, Jetstream Series 200 and 3101, and Jetstream 
Model 3201 airplanes. AD 2017-15-06 requires repetitively inspecting 
the main landing gear (MLG) for cracks and, if cracks are found, 
replacing the MLG with an airworthy part. Since the FAA issued AD 2017-
15-06, the Civil Aviation Authority (CAA) of the United Kingdom 
superseded the mandatory continuing airworthiness information (MCAI) 
issued by the European Aviation Safety Agency (EASA) to correct an 
unsafe condition on these products. This proposed AD would retain the 
initial inspection and the calculation of hours time-in-service to 
flight cycle (FC) actions required by AD 2017-15-06, but would decrease 
the repetitive inspection interval time from 1,200 flight cycles to 900 
flight cycles. 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 May 12, 
2022.

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 https://www.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.
    For British Aerospace service information identified in this NPRM, 
contact BAE Systems (Operations) Ltd., Customer Information Department, 
Prestwick International Airport, Ayrshire, KA9 2RW, United Kingdom; 
phone: +44 3300 488727; fax: +44 1292 675704; email: 
[email protected]; website: https://www.baesystems.com/Businesses/RegionalAircraft/. For H[eacute]roux Devtek service 
information identified in this NPRM, contact H[eacute]roux Devtek 
Product Support, 8, Pembroke Court, Manor Park, Runcorn, Cheshire, WA7 
1TG, United Kingdom; phone: (855) 679-5450; email: 
[email protected]; website: https://www.herouxdevtek.com/en/contact-us. You may view this service 
information at the Airworthiness Products Section, Operational Safety 
Branch, FAA, 901 Locust, Kansas City, MO 64106. For information on the 
availability of this material at the FAA, call (817) 222-5110.

Examining the AD Docket

    You may examine the AD docket at https://www.regulations.gov by 
searching for and locating Docket No. FAA-2022-0291; 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 MCAI, 
any comments received, and other information. The street address for 
Docket Operations is listed above.

FOR FURTHER INFORMATION CONTACT: Doug Rudolph, Aviation Safety 
Engineer, General Aviation & Rotorcraft Section, International 
Validation Branch, FAA, 901 Locust, Room 301, Kansas City, MO 64106; 
phone: (816) 329-4059; 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-2022-0291; Project Identifier 
MCAI-2021-01321-A'' 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 
the 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 
https://www.regulations.gov, including any personal information you 
provide. The agency will also post a report summarizing each 
substantive verbal contact received about this proposed AD.

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 Doug 
Rudolph, Aviation Safety Engineer, General Aviation & Rotorcraft 
Section, International Validation Branch, FAA, 901 Locust, Room 301, 
Kansas City, MO 64106. Any commentary that the FAA receives which is 
not specifically designated as CBI will be placed in the public docket 
for this rulemaking.

Background

    The FAA issued AD 2017-15-06, Amendment 39-18966 (82 FR 34846, July 
27, 2017) (AD 2017-15-06), for British Aerospace Regional Aircraft 
Model HP.137 Jetstream Mk.1, Jetstream Series 200 and 3101, and 
Jetstream Model 3201 airplanes. AD 2017-15-06 was prompted by MCAI 
originated by EASA, which is the Technical Agent for the Member States 
of the European Union. EASA issued EASA AD 2017-0053, dated March 24, 
2017, to correct an unsafe condition identified as cracks in the MLG 
fitting at the pintle to cylinder interface, which could cause failure 
of the MLG.
    AD 2017-15-06 requires repetitively inspecting the MLG and, if 
cracks are found, replacing the MLG with an airworthy part. The FAA 
issued AD 2017-15-06 to detect and correct cracks in the MLG, which 
could lead to structural failure of the MLG and result in loss of 
control during takeoffs and landings.

Actions Since AD 2017-15-06 Was Issued

    Since the FAA issued AD 2017-15-06, the CAA superseded EASA AD 
2017-0053, dated March 24, 2017, and issued CAA AD G-2021-0015 dated 
November 24, 2021 (referred to after this as ``the MCAI''). The MCAI 
states:

    Cracks were found during early fatigue testing and in service on 
the main landing gear (MLG) main fitting at the pintle to cylinder 
interface.
    This condition if not detected and corrected, could lead to 
structural failure of the MLG, possibly resulting in loss of control 
of the aeroplane during take-off or landing runs.
    To address this unsafe condition, BAE Systems (Operations) Ltd 
published several Service Bulletins (ISB) which, in 1996, were 
consolidated into a single bulletin, SB 32-JA960142, to provide 
instructions for inspection. CAA issued AD 005-03-96

[[Page 17213]]

accordingly to require repetitive inspections of the MLG.
    In 2014 a crack was found which was below the critical crack 
length, but unusually large compared to similar cracks previously 
found in service. Further investigation into the subject determined 
that the existing inspection intervals remain valid but also showed 
that the assumed detectable defect size of a 1.27mm [millimeters] 
(0.05 in) [inch] crack could not be guaranteed using the then 
defined accomplishment instructions for a high frequency eddy 
current (HFEC) or fluorescent dye penetrant (FDP) inspection.
    Consequently, BAE Systems (Operations) Ltd issued SB 32-JA960142 
Revision 4, which provided an improved procedure for HFEC and FDP 
inspection to ensure the detection of cracks of 1.27 mm (0.05 in) 
length.
    In response to this revision, EASA issued AD 2017-0053 
(corrected 24 March 2017) addressing the need for revised inspection 
procedures.
    Recently, an operator performing [EASA] AD 2017-0053 
(referencing SB 32-JA960142 rev 4) identified 3 crack indications 
(13 mm, 3 mm & 8 mm) in close proximity, the total length of which 
was approximately 38 mm. This was an unusual report based of 
reported findings over the 24 years since the SB was initially 
released. In depth laboratory investigation of the discrepant part 
was undertaken, which found that the material was to specification 
and the cracks were fatigue in nature. The investigation was unable 
to establish a reason for the cracks being different in nature to 
those previously reported.
    In response, a further damage tolerance analysis was performed, 
which identified the need to reduce the repeat inspection interval 
defined in [EASA] AD 2017-0053. That is, a reduction from a repeat 
of 1,200 flight cycles (FC) to a repeat of 900 FC.
    For the reasons described above, this [CAA] AD retains the 
requirements of CAA UK AD 005-03-96 (superseded by EASA AD) and EASA 
AD 2017-0053 (superseded by this CAA AD) and requires the 
accomplishment of repetitive inspections in accordance with new 
repetitive inspection requirements.

    You may examine the MCAI in the AD docket at https://www.regulations.gov by searching for and locating Docket No. FAA-2022-
0291.

Related Service Information Under 1 CFR Part 51

    The FAA reviewed British Aerospace Jetstream Series 3100 & 3200 
Service Bulletin 32-JA960142, Revision 5, dated December 13, 2019. This 
service information specifies procedures for doing a fluorescent 
penetrant inspection for cracks in the MLG. Alternatively, this service 
information specifies conducting an eddy current inspection for cracks 
in the MLG in accordance with H[eacute]roux Devtek Service Bulletin No. 
32-56, Revision 4, dated August 16, 2016, which was incorporated by 
reference as of August 31, 2017 (82 FR 34846).
    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.

Other Related Service Information

    The FAA reviewed British Aerospace Jetstream Series 3100 & 3200 
Service Bulletin 32-JA960142, Revision 4, dated October 21, 2016. This 
service information specifies procedures for doing a fluorescent 
penetrant inspection for cracks in the MLG. Alternatively, this service 
information specifies conducting an eddy current inspection for cracks 
in the MLG in accordance with H[eacute]roux Devtek Service Bulletin No. 
32-56, Revision 4, dated August 16, 2016. This service information also 
specifies corrective actions if any crack found exceeds a certain 
length.

FAA's Determination

    This product has been approved by the aviation authority of another 
country and is 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 and 
service information referenced above. The FAA is issuing this NPRM 
after determining 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 retain the initial inspection, the 
calculation of hours time-in-service to flight cycle (FC) action, and 
replacement as necessary required by AD 2017-15-06, but would decrease 
the repetitive inspection interval time from 1,200 flight cycles to 900 
flight cycles.

Differences Between This Proposed AD and the MCAI

    The MCAI does not apply to the Model HP.137 Jetstream Mk.1 or Model 
Jetstream Series 200, whereas this proposed AD would include those 
models because they have an FAA type certificate and share a similar 
type design in the affected area.
    The MCAI and service information apply to Model Jetstream Series 
3100 and Jetstream Series 3200 airplanes, which are identified on the 
FAA type certificates as Jetstream Model 3101 and Jetstream Model 3201 
airplanes, respectively.
    The MCAI gives credit for inspections and corrective actions 
accomplished before the effective date of the MCAI using BAE Systems 
(Operations) Ltd SB 32-JA960142 Revision 5, Revision 4, or Revision 3. 
This proposed AD would not give credit for Revision 3, as AD 2017-15-06 
did not provide credit and the FAA did not receive any requests to use 
Revision 3 as an alternative method of compliance.
    The MCAI requires compliance with all of the accomplishment 
instructions in the service information, which includes reporting the 
inspection results (if there is a crack) to the manufacturer. This 
proposed AD would not require reporting information to the 
manufacturer.

Costs of Compliance

    The FAA estimates that this AD, if adopted as proposed, would 
affect 18 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          airplane          operators
----------------------------------------------------------------------------------------------------------------
Inspection......................  6 work-hours x $85   Not applicable.....            $510   $9,180 per
                                   per hour = $510.                                           inspection cycle.
----------------------------------------------------------------------------------------------------------------

    The FAA estimates the following costs to replace the MLG based on 
the results of the proposed inspection. The FAA has no way of 
determining the number of airplanes that might need this replacement:

[[Page 17214]]



                                               On-Condition Costs
----------------------------------------------------------------------------------------------------------------
                                                                                                     Cost per
                    Action                                 Labor cost               Parts cost       airplane
----------------------------------------------------------------------------------------------------------------
Replace the MLG...............................  1 work-hour x $85 per hour = $85          $5,000          $1,530
----------------------------------------------------------------------------------------------------------------

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 that the 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:
0
a. Removing Airworthiness Directive 2017-15-06, Amendment 39-18966 (82 
FR 34846, July 27, 2017); and
0
b. Adding the following new airworthiness directive:

British Aerospace (Operations) Limited and British Aerospace 
Regional Aircraft: Docket No. FAA-2022-0291; Project Identifier 
MCAI-2021-01321-A.

(a) Comments Due Date

    The FAA must receive comments on this airworthiness directive 
(AD) by May 12, 2022.

(b) Affected ADs

    This AD replaces AD 2017-15-06, Amendment 39-18966 (82 FR 34846, 
July 27, 2017) (AD 2017-15-06).

(c) Applicability

    This AD applies to British Aerospace (Operations) Limited Model 
HP.137 Jetstream Mk.1, Jetstream Series 200, and Jetstream Model 
3101 airplanes and British Aerospace Regional Aircraft Model 
Jetstream Model 3201 airplanes, all serial numbers, certificated in 
any category.

(d) Subject

    Joint Aircraft System Component (JASC) Code 3211, Main Landing 
Gear Attach Section.

(e) Unsafe Condition

    This AD was prompted by cracks found on the main landing gear 
(MLG) main fitting at the pintle to cylinder interface. The FAA is 
issuing this AD to detect and correct cracks in the MLG. The unsafe 
condition, if not addressed, could cause failure of the MLG, which 
could result in loss of control of the airplane during takeoffs and 
landings.

(f) Compliance

    Comply with this AD within the compliance times specified, 
unless already done.

(g) Actions

    (1) Within the compliance times listed in paragraph (g)(1)(i) or 
(ii) of this AD, as applicable, inspect the MLG for cracks by 
following Appendix 1, sections A through G, of British Aerospace 
Jetstream Series 3100 & 3200 Service Bulletin 32-JA960142, Revision 
5, dated December 13, 2019; or the Accomplishment Instructions, 
sections A through D(6), in H[eacute]roux Devtek Service Bulletin 
32-56, Revision 4, dated August 16, 2016.
    (i) For airplanes that have been inspected in accordance with AD 
2017-15-06: Before the MLG accumulates 900 flight cycles since the 
last inspection or within 150 flight cycles after the effective date 
of this AD, whichever occurs later, and thereafter at intervals not 
to exceed 900 flight cycles.
    (ii) For airplanes that have not been inspected in accordance 
with AD 2017-15-06: Before the MLG accumulates 8,000 flight cycles 
since first installation on an airplane or within 50 flight cycles 
after the effective date of this AD, whichever occurs later, and 
thereafter at intervals not to exceed 900 flight cycles.
    (2) If any crack is found during any inspection required by 
paragraph (g)(1) of this AD, before further flight, replace the MLG 
with an airworthy MLG and continue the inspections as required by 
paragraph (g)(1) of this AD.
    (3) The compliance times in paragraphs (g)(1)(i) and (ii) of 
this AD are presented in flight cycles (landings). If the number of 
total flight cycles is unknown, for purposes of this AD, the number 
of flight cycles is the hours time-in-service (TIS) accumulated on 
the airplane multiplied by 0.75. For example:
    (i) 100 hours TIS x 0.75 = 75 flight cycles.
    (ii) 1,000 hours TIS x 0.75 = 750 flight cycles.

(h) 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 certification office, send it to the 
attention of the person identified in paragraph (i)(1) 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.

(i) Related Information

    (1) For more information about this AD, contact Doug Rudolph, 
Aviation Safety Engineer, General Aviation & Rotorcraft Section, 
International Validation Branch, FAA, 901 Locust, Room 301, Kansas 
City, MO 64106; phone: (816) 329-4059; email: [email protected].
    (2) Refer to Civil Aviation Authority (CAA) AD G-2021-0015, 
dated November 24, 2021, for more information. You may examine the 
CAA AD in the AD docket at

[[Page 17215]]

https:www.regulations.gov by searching for and locating Docket No. 
FAA-2022-0291.
    (3) For British Aerospace service information identified in this 
AD, contact BAE Systems (Operations) Ltd., Customer Information 
Department, Prestwick International Airport, Ayrshire, KA9 2RW, 
United Kingdom; phone: +44 3300 488727; fax: +44 1292 675704; email: 
[email protected]; website: https://www.baesystems.com/Businesses/RegionalAircraft/. For H[eacute]roux Devtek service 
information identified in this AD, contact H[eacute]roux Devtek 
Product Support, 8, Pembroke Court, Manor Park, Runcorn, Cheshire, 
WA7 1TG, United Kingdom; phone: (855) 679-5450; email: 
[email protected]; website: https://www.herouxdevtek.com/en/contact-us. You may view this service 
information at the Airworthiness Products Section, Operational 
Safety Branch, FAA, 901 Locust, Kansas City, MO 64106. For 
information on the availability of this material at the FAA, call 
(817) 222-5110.

    Issued on March 22, 2022.
Lance T. Gant,
Director, Compliance & Airworthiness Division, Aircraft Certification 
Service.
[FR Doc. 2022-06428 Filed 3-25-22; 8:45 am]
BILLING CODE 4910-13-P