Airworthiness Directives; Leonardo S.p.a. Helicopters, 57574-57577 [2021-22468]

Download as PDF 57574 Federal Register / Vol. 86, No. 198 / Monday, October 18, 2021 / Rules and Regulations AS350BA, AS350B1, AS350B2, AS350B3, AS350D, AS355E, AS355F, AS355F1, AS355F2, AS355N, AS355NP, AS–365N2, AS 365 N3, EC120B, EC130B4, EC130T2, EC 155B, EC155B1, SA–365N, and SA–365N1 helicopters, and Note 1 to paragraph (c)(1): Helicopters with an AS350B3e designation are Model AS350B3 helicopters. (2) Airbus Helicopters Deutschland GmbH (AHD) Model EC135P1, EC135P2, EC135P2+, EC135P3, EC135T1, EC135T2, EC135T2+, EC135T3, MBB–BK117 C–2, and MBB– BK117 D–2 helicopters. Note 2 to paragraph (c)(2): Helicopters with an EC135P3H designation are Model EC135P3 helicopters. Helicopters with an EC135T3H designation are Model EC135T3 helicopters. Helicopters with an MBB–BK117 C–2e designation are Model MBB–BK117 C– 2 helicopters. (d) Subject Joint Aircraft System Component (JASC) Code: 2500, Cabin Equipment/Furnishings. (e) Unsafe Condition This AD was prompted by failure of an Emergency Flotation System (EFS) float compartment to inflate during maintenance of the EFS. The FAA is issuing this AD to address a blocked float supply hose. The unsafe condition, if not addressed, could result in partial inflation of an EFS float during an emergency landing on water and subsequently preventing a timely egress from the helicopter, which could result in injury to helicopter occupants. (f) Compliance Comply with this AD within the compliance times specified, unless already done. jspears on DSK121TN23PROD with RULES1 (g) Requirements Except as specified in paragraph (h) of this AD: Comply with all required actions and compliance times specified in, and in accordance with, EASA AD 2020–0064. (h) Exceptions to EASA AD 2020–0064 (1) Where EASA AD 2020–0064 refers to its effective date, this AD requires using the effective date of this AD. (2) Where paragraph (1) of the EASA AD requires inspecting each affected part within the compliance time defined in section 1.E of the applicable ASB, this AD requires inspecting each affected part within 100 hours time-in-service (TIS) after the effective date of this AD. (3) Where the service information referenced in paragraph (1) of EASA AD 2020–0064 specifies that ‘‘the work must be performed on the helicopter by the operator,’’ this AD requires that the work be accomplished by a mechanic that meets the requirements of 14 CFR part 65 subpart D. (4) Where the service information referenced in EASA AD 2020–0064 specifies replacing or removing an affected hose that fails the inspection, this AD requires removing the hose from service. (5) Where the service information referenced in EASA AD 2020–0064 specifies to discard certain parts, this AD requires removing those parts from service. VerDate Sep<11>2014 16:35 Oct 15, 2021 Jkt 256001 (6) Where the service information referenced in EASA AD 2020–0064 specifies returning the EFS to the Safran Aerosystems network for compliance or returning clogged hoses to Safran Aerosystems Services, this AD does not include those requirements. (7) This AD does not mandate compliance with the ‘‘Remarks’’ section of EASA AD 2020–0064. (i) Clarification of Required Service Information As required by the Definitions section and paragraph (4.2) of EASA AD 2020–0064, this AD requires using Safran Aerosystems Service Bulletin (SB) 025–69–18, Revision 1, dated February 4, 2020, or Safran Aerosystems SB 025–69–18, Revision 2, dated March 24, 2021. (j) No Reporting Requirement Although the service information referenced in EASA AD 2020–0064 specifies to submit certain information to the manufacturer, this AD does not include that requirement. (k) Alternative Methods of Compliance (AMOCs) (1) The Manager, International Validation Branch, FAA, has the authority to approve AMOCs for this AD, if requested using the procedures found in 14 CFR 39.19. In accordance with 14 CFR 39.19, send your request to your principal inspector or local Flight Standards District Office, as appropriate. If sending information directly to the manager of the International Validation Branch, send it to the attention of the person identified in paragraph (l) of this AD. Information may be emailed to: 9-AVS-AIR730-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. (l) Related Information For more information about this AD, contact Andrea Jimenez, Aerospace Engineer, Airframe and Propulsion Section, FAA, New York ACO Branch, 1600 Stewart Avenue, Suite 410, Westbury, NY 11590; telephone 516–228–7330; fax 516–794–5531; email 9avs-nyaco-cos@faa.gov. (m) Material Incorporated by Reference (1) The Director of the Federal Register approved the incorporation by reference (IBR) 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 this AD specifies otherwise. (i) European Union Aviation Safety Agency (EASA) AD 2020–0064, dated March 19, 2020. (ii) Safran Aerosystems Service Bulletin (SB) 025–69–18, Revision 1, dated February 4, 2020. (iii) Safran Aerosystems SB 025–69–18, Revision 2, dated March 24, 2021. (3) For EASA AD 2020–0064, contact the EASA, Konrad-Adenauer-Ufer 3, 50668 Cologne, Germany; telephone +49 221 8999 PO 00000 Frm 00046 Fmt 4700 Sfmt 4700 000; email ADs@easa.europa.eu; Internet www.easa.europa.eu. You may find this EASA AD on the EASA website at https:// ad.easa.europa.eu. For Safran Aerosystems service information identified in this AD, contact Safran Aerosystems, Technical Publication Department, 61 rue Pierre Curie CS20001, 78373 Plaisir Cedex, France; telephone (33) 1 61 34 23 23; fax (33) 1 61 34 24 41; or at https://www.safranaerosystems.com/customers-0. (4) You may view this service information at the FAA, Office of the Regional Counsel, Southwest Region, 10101 Hillwood Pkwy., Room 6N–321, Fort Worth, TX 76177. For information on the availability of this material at the FAA, call 817–222–5110. This material may be found in the AD docket on the internet at https://www.regulations.gov by searching for and locating Docket No. FAA–2021–0496. (5) You may view this material 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 https:// www.archives.gov/federal-register/cfr/ibrlocations.html. Issued on September 16, 2021. Lance T. Gant, Director, Compliance & Airworthiness Division, Aircraft Certification Service. [FR Doc. 2021–22467 Filed 10–15–21; 8:45 am] BILLING CODE 4910–13–P DEPARTMENT OF TRANSPORTATION Federal Aviation Administration 14 CFR Part 39 [Docket No. FAA–2021–0579; Project Identifier MCAI–2020–00267–R; Amendment 39–21748; AD 2021–20–10] RIN 2120–AA64 Airworthiness Directives; Leonardo S.p.a. Helicopters Federal Aviation Administration (FAA), DOT. ACTION: Final rule. AGENCY: The FAA is adopting a new airworthiness directive (AD) for certain Leonardo S.p.a. Model AB139 and AW139 helicopters. This AD was prompted by a report of several occurrences of a cracked main gearbox (MGB) spherical bearing lock nut (lock nut). This AD requires removing from service a certain part-numbered MGB lock nut that is installed on certain partnumbered MGBs and replacing it with newly designed MGB lock nut. This AD also prohibits installing any MGB with the affected MGB lock nut and prohibits installing any affected MGB lock nut on any helicopter. The FAA is issuing this AD to address the unsafe condition on these products. SUMMARY: E:\FR\FM\18OCR1.SGM 18OCR1 Federal Register / Vol. 86, No. 198 / Monday, October 18, 2021 / Rules and Regulations This AD is effective November 22, 2021. The Director of the Federal Register approved the incorporation by reference of a certain document listed in this AD as of November 22, 2021. ADDRESSES: For service information identified in this final rule, contact Leonardo S.p.A. Helicopters, Emanuele Bufano, Head of Airworthiness, Viale G.Agusta 520, 21017 C.Costa di Samarate (Va) Italy; telephone +39– 0331–225074; fax +39–0331–229046; or at https:// customerportal.leonardocompany.com/ en-US/. You may view the referenced service information at the FAA, Office of the Regional Counsel, Southwest Region, 10101 Hillwood Pkwy., Room 6N–321, Fort Worth, TX 76177. For information on the availability of this material at the FAA, call (817) 222–5110. Service information that is incorporated by reference is also available at https:// www.regulations.gov by searching for and locating Docket No. FAA–2021– 0579. DATES: Examining the AD Docket You may examine the AD docket at https://www.regulations.gov by searching for and locating Docket No. FAA–2021–0579; or in person at Docket Operations between 9 a.m. and 5 p.m., Monday through Friday, except Federal holidays. The AD docket contains this final rule, the European Union Aviation Safety Agency (EASA) AD, any comments received, and other information. The street address for Docket Operations is U.S. Department of Transportation, Docket Operations, M– 30, West Building Ground Floor, Room W12–140, 1200 New Jersey Avenue SE, Washington, DC 20590. FOR FURTHER INFORMATION CONTACT: Rao Edupuganti, Aerospace Engineer, Dynamic Systems Section, Technical Innovation Policy Branch, Policy & Innovation Division, FAA, 10101 Hillwood Pkwy., Fort Worth, TX 76177; telephone (817) 222–5110; email rao.edupuganti@faa.gov. SUPPLEMENTARY INFORMATION: jspears on DSK121TN23PROD with RULES1 Background The FAA issued a notice of proposed rulemaking (NPRM) to amend 14 CFR part 39 by adding an AD that would apply to Leonardo S.p.a. Model AB139 and AW139 helicopters, without MGB lock nut part number (P/N) 3G6320A09152 installed and with MGB P/N 3G6320A00131, 3G6320A00132, 3G6320A00133, 3G6320A00134, 3G6320A00135, 3G6320A00136, 3G6320A22031, 4G6320A00132, or VerDate Sep<11>2014 16:35 Oct 15, 2021 Jkt 256001 4G6320A00133 installed; or MGB P/N 3G320A00133 with serial number (S/N) M23, or MGB P/N 3G6320A00134, with S/N M6, N76, N92, P124, P129, P131, P162, P184, Q230, Q243, Q249, R272, V21, V39, V96, V163, V211, V241, V272, V281, V384, V386, or V622 installed; or MGB P/N 3G6320A00136 with S/N AW1, AW2, AW3, AW5, or AW10 installed. The NPRM published in the Federal Register on July 26, 2021 (86 FR 39984). In the NPRM, the FAA proposed to require within 100 hours time in service (TIS) or during the next scheduled MGB overhaul, whichever occurs first after the effective date of this AD, removing a certain partnumbered MGB lock nut from service and replacing it with a different partnumbered MGB lock nut. The NPRM also proposed to prohibit installing an MGB having an affected MGB lock nut and also prohibit installing an affected MGB lock nut on any helicopter as of the effective date of the NPRM. The NPRM was prompted a series of EASA ADs beginning with EASA AD 2019–0036, dated February 15, 2019 (EASA AD 2019–0036), issued by EASA, which is the Technical Agent for the Member States of the European Union, to correct an unsafe condition for all serial-numbered Leonardo S.p.a. Helicopters (formerly Finmeccanica S.p.A, AgustaWestland S.p.A., Agusta S.p.A.; and AgustaWestland Philadelphia Corporation, formerly Agusta Aerospace Corporation) Model AB139 and AW139 helicopters. EASA advised that an occurrence was reported of a cracked MGB lock nut P/N 3G6310A09151, which is used to keep the planetary gears in position. EASA AD 2019–0036 required replacing each MGB lock nut with an airworthy MGB lock nut. EASA advised this condition, if not detected and corrected, could lead to failure of the MGB planetary gears, resulting in loss of control of the helicopter. After EASA issued EASA AD 2019– 0036, an additional occurrence was reported of a cracked MGB lock nut P/N 3G6320A09151. Accordingly, EASA superseded EASA AD 2019–0036 with EASA AD 2019–0174, dated July 18, 2019 (EASA AD 2019–0174), which retained the requirements of EASA AD 2019–0036 but reduced the compliance times. After EASA issued EASA AD 2019–0174, Leonardo Helicopters issued Alert Service Bulletin No. 139–609, dated December 18, 2019 to provide instructions for replacing the affected MGB lock nut with MGB lock nut P/N 3G6320A09152, which has a redesigned flange reducing the stress at the bearing nut locations where cracks were detected. PO 00000 Frm 00047 Fmt 4700 Sfmt 4700 57575 Accordingly, EASA then issued EASA AD 2020–0011, dated January 29, 2020, and corrected January 30, 2020 (EASA AD 2020–0011), which superseded EASA AD 2019–0174, and partially retained the requirements of EASA AD 2019–0174. EASA AD 2020–0011 revised the compliance times in EASA AD 2019–0174, required replacing each affected MGB lock nut with a newly designed MGB lock nut, and prohibited installing an affected MGB on any helicopter. After EASA issued EASA AD 2020–0011, EASA identified certain MGB part numbers that were inadvertently categorized incorrectly and therefore listed in the wrong group of helicopters. Accordingly, EASA issued EASA AD 2020–0011R1, dated November 20, 2020 (EASA AD 2020– 011R1), thereby revising EASA AD 2020–0011. EASA AD 2020–0011R1 retains the requirements of EASA AD 2020–0011 and corrects Appendix 1 of EASA AD 2020–0011. After EASA issued EASA AD 2020– 0011R1, Leonardo Helicopters issued Alert Service Bulletin No. 139–609, Revision A, dated April 13, 2021 (ASB 139–609 Rev A), which identifies an additional part-numbered MGB, which is also affected by the unsafe condition. Accordingly, EASA superseded EASA AD 2020–0011R1 with EASA AD 2021– 0121, dated May 4, 2021 (EASA AD 2021–0121). EASA AD 2021–0121 adds an additional part-numbered MGB with a certain S/N to the list of affected parts. EASA AD 2021–0121 retains the requirements of EASA AD 2020– 0011R1, and corrects Table 1 and Appendix 1 of EASA AD 2020–0011R1. Discussion of Final Airworthiness Directive Comments The FAA received no comments on the NPRM or on the determination of the costs. Conclusion These helicopters have been approved by EASA and are approved for operation in the United States. Pursuant to the FAA’s bilateral agreement with the European Union, EASA has notified the FAA about the unsafe condition described in its AD. The FAA reviewed the relevant data and determined that air safety requires adopting this AD as proposed. Accordingly, the FAA is issuing this AD to address the unsafe condition on these products. Related Service Information Under 1 CFR Part 51 The FAA reviewed ASB 139–609 Rev A, which specifies procedures for replacing an affected MGB lock nut with E:\FR\FM\18OCR1.SGM 18OCR1 57576 Federal Register / Vol. 86, No. 198 / Monday, October 18, 2021 / Rules and Regulations the new MGB lock nut, within certain compliance times for certain partnumbered MGBs with certain serial numbers. 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 the ADDRESSES section. Other Related Service Information The FAA also reviewed Leonardo Helicopters ASB No. 139–567, Revision B, dated October 18, 2019, which provides additional information for replacing the MGB lock nut. Differences Between This AD and EASA AD 2021–0121 EASA AD 2021–0121 requires a compliance time based on number of landings, whereas this AD requires a compliance time based on hours TIS. The service information referenced in EASA AD 2021–0121 requires submitting certain information and parts to Leonardo, whereas this AD does not. EASA AD 2021–0121 applies to all serial-numbered Model AB139 and AW139 helicopters, whereas this AD only applies to Model AB139 and AW139 helicopters without certain partnumbered MGB lock nuts installed and with certain part-numbered MGBs installed. jspears on DSK121TN23PROD with RULES1 Costs of Compliance The FAA estimates that this AD affects 130 helicopters of U.S. Registry. Labor rates are estimated at $85 per work-hour. Based on these numbers, the FAA estimates the following costs to comply with this AD. Replacing each affected MGB lock nut with a newly designed MGB lock nut takes about 190 work-hours (during next MGB overhaul) and parts cost about $7,600 for an estimated cost of $23,750 per replacement. 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. VerDate Sep<11>2014 16:35 Oct 15, 2021 Jkt 256001 This regulation is within the scope of that authority because it addresses an unsafe condition that is likely to exist or develop on helicopters identified in this rulemaking action. Regulatory Findings This AD will not have federalism implications under Executive Order 13132. This AD will not have a substantial direct effect on the States, on the relationship between the national government and the States, or on the distribution of power and responsibilities among the various levels of government. For the reasons discussed above, I certify that this AD: (1) Is not a ‘‘significant regulatory action’’ under Executive Order 12866, (2) Will not affect intrastate aviation in Alaska, and (3) Will not have a significant economic impact, positive or negative, on a substantial number of small entities under the criteria of the Regulatory Flexibility Act. List of Subjects in 14 CFR Part 39 Air transportation, Aircraft, Aviation safety, Incorporation by reference, Safety. The Amendment Accordingly, under the authority delegated to me by the Administrator, the FAA amends 14 CFR part 39 as follows: PART 39—AIRWORTHINESS DIRECTIVES 1. The authority citation for part 39 continues to read as follows: ■ Authority: 49 U.S.C. 106(g), 40113, 44701. § 39.13 [Amended] 2. The FAA amends § 39.13 by adding the following new airworthiness directive: ■ 2021–20–10 Leonardo S.p.a.: Amendment 39–21748; Docket No. FAA–2021–0579; Project Identifier MCAI–2020–00267. (a) Effective Date This airworthiness directive (AD) is effective November 22, 2021. (b) Affected ADs None. (c) Applicability This AD applies to Leonardo S.p.a. Model AB139 and AW139 helicopters, certificated in any category, without main gearbox (MGB) spherical bearing lock nut (lock nut) part number (P/N) 3G6320A09152 installed and with: (1) MGB P/N 3G6320A00131, 3G6320A00132, 3G6320A00133, 3G6320A00134, 3G6320A00135, PO 00000 Frm 00048 Fmt 4700 Sfmt 4700 3G6320A00136, 3G6320A22031, 4G6320A00132, or 4G6320A00133 installed, or (2) MGB P/N 3G320A00133 with serial number (S/N) M23, or MGB P/N 3G6320A00134, with S/N M6, N76, N92, P124, P129, P131, P162, P184, Q230, Q243, Q249, R272, V21, V39, V96, V163, V211, V241, V272, V281, V384, V386, or V622 installed, or (3) MGB P/N 3G6320A00136 with S/N AW1, AW2, AW3, AW5, or AW10 installed. (d) Subject Joint Aircraft Service Component (JASC) Code: 6320, Main Rotor Gearbox. (e) Unsafe Condition This AD was prompted by a cracked MGB lock nut. The FAA is issuing this AD to replace an affected MGB lock nut with a new MGB lock nut. The unsafe condition, if not addressed, could result in failure of the MGB planetary gears, resulting in loss of control of the helicopter. (f) Compliance Comply with this AD within the compliance times specified, unless already done. (g) Required Actions (1) Within 100 hours time-in-service, or during the next scheduled MGB overhaul, whichever occurs first after the effective date of this AD, remove each MGB lock nut P/N 3G6320A09151 from service and replace with MGB lock nut P/N 3G6320A09152 in accordance with Annex A, steps 1 through 17, of Leonardo Helicopters Alert Service Bulletin No. 139–609, Revision A, dated April 13, 2021, except you are not required to send parts to Leonardo Helicopters. Note to paragraph (g)(1): Leonardo Helicopters service information refers to an MGB lock nut as a ring nut. (2) As of the effective date of this AD, do not install any MGB having MGB lock nut P/ N 3G630A09151 on any helicopter, and do not install any MGB lock nut P/N 3G630A09151 on any helicopter. (h) Special Flight Permits Special flight permits are prohibited. (i) Alternative Methods of Compliance (AMOCs) (1) The Manager, International Validation Branch, FAA, has the authority to approve AMOCs for this AD, if requested using the procedures found in 14 CFR 39.19. In accordance with 14 CFR 39.19, send your request to your principal inspector or local Flight Standards District Office, as appropriate. If sending information directly to the manager of the International Validation Branch, send it to the attention of the person identified in paragraph (j)(1) of this AD. Information may be emailed to: 9-AVS-AIR730-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. E:\FR\FM\18OCR1.SGM 18OCR1 Federal Register / Vol. 86, No. 198 / Monday, October 18, 2021 / Rules and Regulations (j) Related Information (1) For more information about this AD, contact Rao Edupuganti, Aerospace Engineer, Dynamic Systems Section, Technical Innovation Policy Branch, Policy & Innovation Division, FAA, 10101 Hillwood Pkwy., Fort Worth, TX 76177; telephone (817) 222–5110; email rao.edupuganti@ faa.gov. (2) The subject of this AD is addressed in European Union Aviation Safety Agency (EASA) AD 2021–0121, dated May 4, 2021. You may view the EASA AD at https:// www.regulations.gov in Docket No. FAA– 2021–0579. (k) 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) Leonardo Helicopters Alert Service Bulletin No. 139–609, Revision A, dated April 13, 2021. (ii) [Reserved] (3) For service information identified in this AD, contact Leonardo S.p.A. Helicopters, Emanuele Bufano, Head of Airworthiness, Viale G. Agusta 520, 21017 C. Costa di Samarate (Va) Italy; telephone +39–0331– 225074; fax +39–0331–229046; or at https:// customerportal.leonardocompany.com/enUS/. (4) You may view this service information at the FAA, Office of the Regional Counsel, Southwest Region, 10101 Hillwood Pkwy., Room 6N–321, Fort Worth, TX 76177. 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: https://www.archives.gov/federal-register/cfr/ ibr-locations.html. Issued on September 16, 2021. Lance T. Gant, Director, Compliance & Airworthiness Division, Aircraft Certification Service. [FR Doc. 2021–22468 Filed 10–15–21; 8:45 am] BILLING CODE 4910–13–P DEPARTMENT OF TRANSPORTATION Federal Aviation Administration jspears on DSK121TN23PROD with RULES1 14 CFR Part 39 [Docket No. FAA–2021–0578; Project Identifier 2018–SW–084–AD; Amendment 39–21741; AD 2021–20–03] RIN 2120–AA64 Airworthiness Directives; Leonardo S.p.a. Helicopters Federal Aviation Administration (FAA), DOT. AGENCY: VerDate Sep<11>2014 16:35 Oct 15, 2021 Jkt 256001 ACTION: Final rule. SUPPLEMENTARY INFORMATION: The FAA is adopting a new airworthiness directive (AD) for certain Leonardo S.p.a. Model AW169 helicopters. This AD was prompted by reports of in-flight pilot collective stick oscillation. This AD requires a one-time measurement of the friction of the pilot collective stick assembly to verify that it is within the allowable range and, depending on findings, making an adjustment to restore the acceptable level of friction, as specified in a European Aviation Safety Agency (now European Union Aviation Safety Agency) (EASA) AD, which is incorporated by reference. The FAA is issuing this AD to address the unsafe condition on these products. DATES: This AD is effective November 22, 2021. The Director of the Federal Register approved the incorporation by reference of a certain publication listed in this AD as of November 22, 2021. ADDRESSES: For material incorporated by reference (IBR) in this AD, contact EASA, Konrad-Adenauer-Ufer 3, 50668 Cologne, Germany; telephone +49 221 8999 000; email ADs@easa.europa.eu; internet www.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, Office of the Regional Counsel, Southwest Region, 10101 Hillwood Pkwy., Room 6N 321, Fort Worth, TX 76177. For information on the availability of this material at the FAA, call (817) 222– 5110. It is also available in the AD docket at https://www.regulations.gov by searching for and locating Docket No. FAA–2021–0578. SUMMARY: Examining the AD Docket You may examine the AD docket at https://www.regulations.gov by searching for and locating Docket No. FAA–2021–0578; or in person at Docket Operations between 9 a.m. and 5 p.m., Monday through Friday, except Federal holidays. The AD docket contains this final rule, the EASA AD, any comments received, and other information. The address for Docket Operations is U.S. Department of Transportation, Docket Operations, M–30, West Building Ground Floor, Room W12–140, 1200 New Jersey Avenue SE, Washington, DC 20590. FOR FURTHER INFORMATION CONTACT: Darren Gassetto, Aerospace Engineer, COS Program Management Section, Operational Safety Branch, Compliance & Airworthiness Division, FAA, 1600 Stewart Ave., Suite 410, Westbury, NY 11590; telephone (516) 228–7323; email Darren.Gassetto@faa.gov. PO 00000 Frm 00049 Fmt 4700 57577 Sfmt 4700 Background EASA, which is the Technical Agent for the Member States of the European Union, has issued EASA AD 2018–0203, dated September 12, 2018 (EASA AD 2018–0203) (also referred to as the Mandatory Continuing Airworthiness Information, or the MCAI), to correct an unsafe condition for Leonardo S.p.A., formerly Finmeccanica S.p.A. and AgustaWestland S.p.A., Model AW169 helicopters, all serial numbers equipped with pilot collective stick assemblies having part number (P/N) 6F6711A07832 or P/N 6F6711A07831. The FAA issued a notice of proposed rulemaking (NPRM) to amend 14 CFR part 39 by adding an AD that would apply to certain Leonardo S.p.a. Model AW169 helicopters. The NPRM published in the Federal Register on July 23, 2021 (86 FR 38950). The NPRM was prompted by reports of in-flight pilot collective stick oscillation. The NPRM proposed to require a one-time measurement of the friction of the pilot collective stick assembly to verify that it is within the allowable range and, depending on findings, making an adjustment to restore the acceptable level of friction, as specified in EASA AD 2018–0203. The FAA is issuing this AD to address incorrect adjustment of the pilot collective stick fixed friction. The unsafe condition, if not addressed, could result in reduced controllability of the helicopter, and subsequent damage to the helicopter and injury to occupants. See EASA AD 2018–0203 for additional background information. Discussion of Final Airworthiness Directive Comments The FAA gave the public the opportunity to participate in developing this final rule. The FAA received no comments on the NPRM or on the determination of the cost to the public. Conclusion The FAA reviewed the relevant data and determined that air safety requires adopting this AD as proposed. Except for minor editorial changes, this AD is adopted as proposed in the NPRM. None of the changes will increase the economic burden on any operator. Accordingly, the FAA is issuing this AD to address the unsafe condition on these products. Related Service Information Under 1 CFR Part 51 EASA AD 2018–0203 requires a onetime measurement of the friction of the E:\FR\FM\18OCR1.SGM 18OCR1

Agencies

[Federal Register Volume 86, Number 198 (Monday, October 18, 2021)]
[Rules and Regulations]
[Pages 57574-57577]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 2021-22468]


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DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2021-0579; Project Identifier MCAI-2020-00267-R; 
Amendment 39-21748; AD 2021-20-10]
RIN 2120-AA64


Airworthiness Directives; Leonardo S.p.a. Helicopters

AGENCY: Federal Aviation Administration (FAA), DOT.

ACTION: Final rule.

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

SUMMARY: The FAA is adopting a new airworthiness directive (AD) for 
certain Leonardo S.p.a. Model AB139 and AW139 helicopters. This AD was 
prompted by a report of several occurrences of a cracked main gearbox 
(MGB) spherical bearing lock nut (lock nut). This AD requires removing 
from service a certain part-numbered MGB lock nut that is installed on 
certain part-numbered MGBs and replacing it with newly designed MGB 
lock nut. This AD also prohibits installing any MGB with the affected 
MGB lock nut and prohibits installing any affected MGB lock nut on any 
helicopter. The FAA is issuing this AD to address the unsafe condition 
on these products.

[[Page 57575]]


DATES: This AD is effective November 22, 2021.
    The Director of the Federal Register approved the incorporation by 
reference of a certain document listed in this AD as of November 22, 
2021.

ADDRESSES: For service information identified in this final rule, 
contact Leonardo S.p.A. Helicopters, Emanuele Bufano, Head of 
Airworthiness, Viale G.Agusta 520, 21017 C.Costa di Samarate (Va) 
Italy; telephone +39-0331-225074; fax +39-0331-229046; or at https://customerportal.leonardocompany.com/en-US/.
    You may view the referenced service information at the FAA, Office 
of the Regional Counsel, Southwest Region, 10101 Hillwood Pkwy., Room 
6N-321, Fort Worth, TX 76177. For information on the availability of 
this material at the FAA, call (817) 222-5110. Service information that 
is incorporated by reference is also available at https://www.regulations.gov by searching for and locating Docket No. FAA-2021-
0579.

Examining the AD Docket

    You may examine the AD docket at https://www.regulations.gov by 
searching for and locating Docket No. FAA-2021-0579; or in person at 
Docket Operations between 9 a.m. and 5 p.m., Monday through Friday, 
except Federal holidays. The AD docket contains this final rule, the 
European Union Aviation Safety Agency (EASA) AD, any comments received, 
and other information. The street address for Docket Operations is U.S. 
Department of Transportation, Docket Operations, M-30, West Building 
Ground Floor, Room W12-140, 1200 New Jersey Avenue SE, Washington, DC 
20590.

FOR FURTHER INFORMATION CONTACT: Rao Edupuganti, Aerospace Engineer, 
Dynamic Systems Section, Technical Innovation Policy Branch, Policy & 
Innovation Division, FAA, 10101 Hillwood Pkwy., Fort Worth, TX 76177; 
telephone (817) 222-5110; email [email protected].

SUPPLEMENTARY INFORMATION:

Background

    The FAA issued a notice of proposed rulemaking (NPRM) to amend 14 
CFR part 39 by adding an AD that would apply to Leonardo S.p.a. Model 
AB139 and AW139 helicopters, without MGB lock nut part number (P/N) 
3G6320A09152 installed and with MGB P/N 3G6320A00131, 3G6320A00132, 
3G6320A00133, 3G6320A00134, 3G6320A00135, 3G6320A00136, 3G6320A22031, 
4G6320A00132, or 4G6320A00133 installed; or MGB P/N 3G320A00133 with 
serial number (S/N) M23, or MGB P/N 3G6320A00134, with S/N M6, N76, 
N92, P124, P129, P131, P162, P184, Q230, Q243, Q249, R272, V21, V39, 
V96, V163, V211, V241, V272, V281, V384, V386, or V622 installed; or 
MGB P/N 3G6320A00136 with S/N AW1, AW2, AW3, AW5, or AW10 installed. 
The NPRM published in the Federal Register on July 26, 2021 (86 FR 
39984). In the NPRM, the FAA proposed to require within 100 hours time 
in service (TIS) or during the next scheduled MGB overhaul, whichever 
occurs first after the effective date of this AD, removing a certain 
part-numbered MGB lock nut from service and replacing it with a 
different part-numbered MGB lock nut. The NPRM also proposed to 
prohibit installing an MGB having an affected MGB lock nut and also 
prohibit installing an affected MGB lock nut on any helicopter as of 
the effective date of the NPRM.
    The NPRM was prompted a series of EASA ADs beginning with EASA AD 
2019-0036, dated February 15, 2019 (EASA AD 2019-0036), issued by EASA, 
which is the Technical Agent for the Member States of the European 
Union, to correct an unsafe condition for all serial-numbered Leonardo 
S.p.a. Helicopters (formerly Finmeccanica S.p.A, AgustaWestland S.p.A., 
Agusta S.p.A.; and AgustaWestland Philadelphia Corporation, formerly 
Agusta Aerospace Corporation) Model AB139 and AW139 helicopters. EASA 
advised that an occurrence was reported of a cracked MGB lock nut P/N 
3G6310A09151, which is used to keep the planetary gears in position. 
EASA AD 2019-0036 required replacing each MGB lock nut with an 
airworthy MGB lock nut. EASA advised this condition, if not detected 
and corrected, could lead to failure of the MGB planetary gears, 
resulting in loss of control of the helicopter.
    After EASA issued EASA AD 2019-0036, an additional occurrence was 
reported of a cracked MGB lock nut P/N 3G6320A09151. Accordingly, EASA 
superseded EASA AD 2019-0036 with EASA AD 2019-0174, dated July 18, 
2019 (EASA AD 2019-0174), which retained the requirements of EASA AD 
2019-0036 but reduced the compliance times. After EASA issued EASA AD 
2019-0174, Leonardo Helicopters issued Alert Service Bulletin No. 139-
609, dated December 18, 2019 to provide instructions for replacing the 
affected MGB lock nut with MGB lock nut P/N 3G6320A09152, which has a 
redesigned flange reducing the stress at the bearing nut locations 
where cracks were detected.
    Accordingly, EASA then issued EASA AD 2020-0011, dated January 29, 
2020, and corrected January 30, 2020 (EASA AD 2020-0011), which 
superseded EASA AD 2019-0174, and partially retained the requirements 
of EASA AD 2019-0174. EASA AD 2020-0011 revised the compliance times in 
EASA AD 2019-0174, required replacing each affected MGB lock nut with a 
newly designed MGB lock nut, and prohibited installing an affected MGB 
on any helicopter. After EASA issued EASA AD 2020-0011, EASA identified 
certain MGB part numbers that were inadvertently categorized 
incorrectly and therefore listed in the wrong group of helicopters. 
Accordingly, EASA issued EASA AD 2020-0011R1, dated November 20, 2020 
(EASA AD 2020-011R1), thereby revising EASA AD 2020-0011. EASA AD 2020-
0011R1 retains the requirements of EASA AD 2020-0011 and corrects 
Appendix 1 of EASA AD 2020-0011.
    After EASA issued EASA AD 2020-0011R1, Leonardo Helicopters issued 
Alert Service Bulletin No. 139-609, Revision A, dated April 13, 2021 
(ASB 139-609 Rev A), which identifies an additional part-numbered MGB, 
which is also affected by the unsafe condition. Accordingly, EASA 
superseded EASA AD 2020-0011R1 with EASA AD 2021-0121, dated May 4, 
2021 (EASA AD 2021-0121). EASA AD 2021-0121 adds an additional part-
numbered MGB with a certain S/N to the list of affected parts. EASA AD 
2021-0121 retains the requirements of EASA AD 2020-0011R1, and corrects 
Table 1 and Appendix 1 of EASA AD 2020-0011R1.

Discussion of Final Airworthiness Directive

Comments

    The FAA received no comments on the NPRM or on the determination of 
the costs.

Conclusion

    These helicopters have been approved by EASA and are approved for 
operation in the United States. Pursuant to the FAA's bilateral 
agreement with the European Union, EASA has notified the FAA about the 
unsafe condition described in its AD. The FAA reviewed the relevant 
data and determined that air safety requires adopting this AD as 
proposed. Accordingly, the FAA is issuing this AD to address the unsafe 
condition on these products.

Related Service Information Under 1 CFR Part 51

    The FAA reviewed ASB 139-609 Rev A, which specifies procedures for 
replacing an affected MGB lock nut with

[[Page 57576]]

the new MGB lock nut, within certain compliance times for certain part-
numbered MGBs with certain serial numbers.
    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 the ADDRESSES section.

Other Related Service Information

    The FAA also reviewed Leonardo Helicopters ASB No. 139-567, 
Revision B, dated October 18, 2019, which provides additional 
information for replacing the MGB lock nut.

Differences Between This AD and EASA AD 2021-0121

    EASA AD 2021-0121 requires a compliance time based on number of 
landings, whereas this AD requires a compliance time based on hours 
TIS. The service information referenced in EASA AD 2021-0121 requires 
submitting certain information and parts to Leonardo, whereas this AD 
does not. EASA AD 2021-0121 applies to all serial-numbered Model AB139 
and AW139 helicopters, whereas this AD only applies to Model AB139 and 
AW139 helicopters without certain part-numbered MGB lock nuts installed 
and with certain part-numbered MGBs installed.

Costs of Compliance

    The FAA estimates that this AD affects 130 helicopters of U.S. 
Registry. Labor rates are estimated at $85 per work-hour. Based on 
these numbers, the FAA estimates the following costs to comply with 
this AD.
    Replacing each affected MGB lock nut with a newly designed MGB lock 
nut takes about 190 work-hours (during next MGB overhaul) and parts 
cost about $7,600 for an estimated cost of $23,750 per replacement.

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 helicopters identified in this rulemaking action.

Regulatory Findings

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

List of Subjects in 14 CFR Part 39

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

The Amendment

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

PART 39--AIRWORTHINESS DIRECTIVES

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

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


Sec.  39.13  [Amended]

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

2021-20-10 Leonardo S.p.a.: Amendment 39-21748; Docket No. FAA-2021-
0579; Project Identifier MCAI-2020-00267.

(a) Effective Date

    This airworthiness directive (AD) is effective November 22, 
2021.

(b) Affected ADs

    None.

(c) Applicability

    This AD applies to Leonardo S.p.a. Model AB139 and AW139 
helicopters, certificated in any category, without main gearbox 
(MGB) spherical bearing lock nut (lock nut) part number (P/N) 
3G6320A09152 installed and with:
    (1) MGB P/N 3G6320A00131, 3G6320A00132, 3G6320A00133, 
3G6320A00134, 3G6320A00135, 3G6320A00136, 3G6320A22031, 
4G6320A00132, or 4G6320A00133 installed, or
    (2) MGB P/N 3G320A00133 with serial number (S/N) M23, or MGB P/N 
3G6320A00134, with S/N M6, N76, N92, P124, P129, P131, P162, P184, 
Q230, Q243, Q249, R272, V21, V39, V96, V163, V211, V241, V272, V281, 
V384, V386, or V622 installed, or
    (3) MGB P/N 3G6320A00136 with S/N AW1, AW2, AW3, AW5, or AW10 
installed.

(d) Subject

    Joint Aircraft Service Component (JASC) Code: 6320, Main Rotor 
Gearbox.

(e) Unsafe Condition

    This AD was prompted by a cracked MGB lock nut. The FAA is 
issuing this AD to replace an affected MGB lock nut with a new MGB 
lock nut. The unsafe condition, if not addressed, could result in 
failure of the MGB planetary gears, resulting in loss of control of 
the helicopter.

(f) Compliance

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

(g) Required Actions

    (1) Within 100 hours time-in-service, or during the next 
scheduled MGB overhaul, whichever occurs first after the effective 
date of this AD, remove each MGB lock nut P/N 3G6320A09151 from 
service and replace with MGB lock nut P/N 3G6320A09152 in accordance 
with Annex A, steps 1 through 17, of Leonardo Helicopters Alert 
Service Bulletin No. 139-609, Revision A, dated April 13, 2021, 
except you are not required to send parts to Leonardo Helicopters.
    Note to paragraph (g)(1): Leonardo Helicopters service 
information refers to an MGB lock nut as a ring nut.
    (2) As of the effective date of this AD, do not install any MGB 
having MGB lock nut P/N 3G630A09151 on any helicopter, and do not 
install any MGB lock nut P/N 3G630A09151 on any helicopter.

(h) Special Flight Permits

    Special flight permits are prohibited.

(i) Alternative Methods of Compliance (AMOCs)

    (1) The Manager, International Validation Branch, FAA, has the 
authority to approve AMOCs for this AD, if requested using the 
procedures found in 14 CFR 39.19. In accordance with 14 CFR 39.19, 
send your request to your principal inspector or local Flight 
Standards District Office, as appropriate. If sending information 
directly to the manager of the International Validation Branch, send 
it to the attention of the person identified in paragraph (j)(1) of 
this AD. Information may be emailed 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.

[[Page 57577]]

(j) Related Information

    (1) For more information about this AD, contact Rao Edupuganti, 
Aerospace Engineer, Dynamic Systems Section, Technical Innovation 
Policy Branch, Policy & Innovation Division, FAA, 10101 Hillwood 
Pkwy., Fort Worth, TX 76177; telephone (817) 222-5110; email 
[email protected].
    (2) The subject of this AD is addressed in European Union 
Aviation Safety Agency (EASA) AD 2021-0121, dated May 4, 2021. You 
may view the EASA AD at https://www.regulations.gov in Docket No. 
FAA-2021-0579.

(k) 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) Leonardo Helicopters Alert Service Bulletin No. 139-609, 
Revision A, dated April 13, 2021.
    (ii) [Reserved]
    (3) For service information identified in this AD, contact 
Leonardo S.p.A. Helicopters, Emanuele Bufano, Head of Airworthiness, 
Viale G. Agusta 520, 21017 C. Costa di Samarate (Va) Italy; 
telephone +39-0331-225074; fax +39-0331-229046; or at https://customerportal.leonardocompany.com/en-US/.
    (4) You may view this service information at the FAA, Office of 
the Regional Counsel, Southwest Region, 10101 Hillwood Pkwy., Room 
6N-321, Fort Worth, TX 76177. 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: https://www.archives.gov/federal-register/cfr/ibr-locations.html.

    Issued on September 16, 2021.
Lance T. Gant,
Director, Compliance & Airworthiness Division, Aircraft Certification 
Service.
[FR Doc. 2021-22468 Filed 10-15-21; 8:45 am]
BILLING CODE 4910-13-P