# AD 2022-02-12: Aircraft Structures, Main Rotor Drive Systems - Type: Airworthiness directive - Status: Current - Products: Leonardo AB139 and AW139 - Effective: March 17, 2022 - Published: February 10, 2022, 87 FR 7687–7690 - Issued: January 11, 2022 - Issued as: Final rule - Superseded by: Nothing supersedes this AD - Product type: Aircraft, Rotorcraft - Amendment: 39-21909 - Docket: FAA-2021-0964 (https://www.regulations.gov/docket/FAA-2021-0964) - Project: 2018-SW-051-AD - Registered aircraft: 165 may be affected, by airframe or engine model (OpenAirDocs) - Official PDF: https://openairdocs.org/files/sha256/aa/b2/aab2447b2fdb5116ca65476a6ff6108df4074130ac9cc04c161eb3881e01ec8c (from https://www.govinfo.gov/content/pkg/FR-2022-02-10/pdf/2022-02747.pdf) - Federal Register: https://www.federalregister.gov/documents/2022/02/10/2022-02747/airworthiness-directives-leonardo-spa-helicopters - FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/FR-ADFRAWD-2022-02747-0000000000.0001 - DRS record last changed: November 21, 2025 - Page: https://openairdocs.org/ad/2022-02-12 ## Summary The FAA is adopting a new airworthiness directive (AD) for all Leonardo S.p.a. Model AB139 and AW139 helicopters. This AD was prompted by the identification of certain parts needing maintenance actions, including life limits and maintenance tasks. This AD requires incorporating into maintenance records requirements (airworthiness limitations), 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. ## The airworthiness directive 1. The authority citation for part 39 continues to read as follows: 2. The FAA amends § 39.13 by adding the following new airworthiness directive: 2022-02-12 Leonardo S.p.a.: Amendment 39-21909; Docket No. FAA-2021-0964; Project Identifier 2018-SW-051-AD. ### (a) Effective Date This airworthiness directive (AD) is effective March 17, 2022. ### (b) Affected ADs None. ### (c) Applicability This AD applies to all Leonardo S.p.a. Model AB139 and AW139 helicopters, certificated in any category. ### (d) Subject Joint Aircraft Service Component (JASC) Code: 5101, Aircraft Structures; and 6300, Main Rotor Drive Systems. ### (e) Unsafe Condition This AD was prompted by the identification of certain parts needing maintenance actions, including life limits and maintenance tasks. The FAA is issuing this AD to address the failure of certain parts, which could result in the loss of control of the helicopter. ### (f) Compliance Comply with this AD within the compliance times specified, unless already done. ### (g) Required Action Within 30 days after the effective date of this AD, incorporate into maintenance records required by 14 CFR 91.417(a)(2) or 135.439(a)(2), as applicable for your rotorcraft, the requirements (airworthiness limitations) specified in paragraph (1) of European Aviation Safety Agency (now European Union Aviation Safety Agency) (EASA) AD 2018-0132, dated June 21, 2018 (EASA AD 2018-0132). ### (h) Provisions for Alternative Requirements (Airworthiness Limitations) After the action required by paragraph (g) of this AD has been done, no alternative requirements (airworthiness limitations) are allowed unless they are approved as specified in the provisions of the “Ref. Publications” section of EASA AD 2018-0132. ### (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) of this AD. Information may be emailed 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. ### (j) Related Information For more information about this AD, contact Kristi Bradley, Program Manager, COS Program Management Section, Operational Safety Branch, Compliance & Airworthiness Division, FAA, 10101 Hillwood Pkwy., Fort Worth, TX 76177; telephone (817) 222-5110; email kristin.bradley@faa.gov. ### (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 this AD specifies otherwise. (i) European Aviation Safety Agency (EASA) AD 2018-0132, dated June 21, 2018. (ii) [Reserved] (3) For EASA AD 2018-0132, 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 the EASA material on EASA website at https://ad.easa.europa.eu. (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 at https://www.regulations.gov by searching for and locating Docket No. FAA-2021-0964. (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/ibr-locations.html. ## Rule preamble ### Dates This AD is effective March 17, 2022. The Director of the Federal Register approved the incorporation by reference of a certain publication listed in this AD as of March 17, 2022. ### Addresses For EASA 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 the EASA 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-2021-0964. ### For further information contact Kristi Bradley, Program Manager, COS Program Management Section, Operational Safety Branch, Compliance & Airworthiness Division, FAA, 10101 Hillwood Pkwy., Fort Worth, TX 76177; telephone (817) 222-5110; email kristin.bradley@faa.gov. ### Background EASA, which is the Technical Agent for the Member States of the European Union, has issued EASA AD 2018-0132, dated June 21, 2018 (EASA AD 2018-0132) (also referred to as the Mandatory Continuing Airworthiness Information, or the MCAI), to correct an unsafe condition for all Leonardo S.p.A. Model AB139 and AW139 helicopters. The FAA issued a notice of proposed rulemaking (NPRM) to amend 14 CFR part 39 by adding an AD that would apply to all Leonardo S.p.A. Model AB139 and AW139 helicopters. The NPRM published in the Federal Register on November 12, 2021 (86 FR 62744). The NPRM was prompted by the identification of certain parts needing maintenance actions, including life limits and maintenance tasks. The parts include a certain part-numbered main rotor damper, tail gear box center housing, and tail assembly, the fuselage structure assembly (station (STA) 5700, right-hand (RH)/left-hand (LH) side), and tail structure assembly (tail/rear fuselage attachment fittings). The NPRM proposed to require incorporating into maintenance records requirements (airworthiness limitations), as specified in EASA AD 2018-0132. The FAA is issuing this AD to address the failure of certain parts, which could result in the loss of control of the helicopter. See EASA AD 2018-0132 for additional background information. ### Comments The FAA received a comment from one commenter, Bristow Group, who commented on the service information. The following presents the comment received on the NPRM and the FAA's response to the comment. ### Request To Consider Service Information The commenter stated it would take into consideration that the service information identified in EASA AD 2018-0132 (Leonardo AB139 and AW139 Maintenance Manual (MM), 39-A-AMPI-00-P, Chapter IV, Airworthiness Limitations, Issue 9, dated March 6, 2018, as well as Issue 8) has already been added. The commenter noted the EASA AMPI ( i.e., the airworthiness limitations section (ALS) document) is already on Issue 14 and the FAA AMPI is on Issue 13. The FAA infers the commenter is requesting the FAA consider the effect of later revisions of the ALS document on the proposed AD. The FAA agrees to clarify the effect of later revisions of the ALS document on this AD. This AD mandates a specific revision of the ALS document. Later revisions of the ALS document are not required to be incorporated into maintenance records requirements (airworthiness limitations) for that helicopter unless an AD mandates those revisions. However, this AD also allows operators to incorporate later approved revisions of the ALS document as specified in the Ref. Publications section of EASA AD 2018-0132 without the need for an alternative method of compliance (AMOC). Historically, operators needed an AMOC to use later revisions of an ALS. The FAA has not changed this AD in this regard. ### 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, considered the comment received, 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 helicopters. 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. ### Related Service Information Under 1 CFR Part 51 EASA AD 2018-0132 requires certain actions and associated thresholds and intervals, including life limits and maintenance tasks. These requirements (airworthiness limitations) include new life limits for a certain part-numbered main rotor damper, tail gear box center housing, and tail assembly; and new maintenance tasks ( e.g., inspections for cracking) for the fuselage structure assembly (STA 5700, RH/LH side), and tail structure assembly (tail/rear fuselage attachment fittings). This material is reasonably available because the interested parties have access to it through their normal course of business or by the means identified in the ADDRESSES section. ### ADs Mandating Airworthiness Limitations The FAA has previously mandated airworthiness limitations by mandating each airworthiness limitation task ( e.g., inspections and replacements (life limits)) as an AD requirement or issuing ADs that require revising the ALS of the existing maintenance manual or instructions for continued airworthiness to incorporate new or revised inspections and life limits. This AD, however, requires operators to incorporate into maintenance records required by 14 CFR 91.417(a)(2) or 135.439(a)(2), as applicable for your rotorcraft, the requirements (airworthiness limitations) specified in an MCAI AD. The FAA does not intend this as a substantive change. For these ADs, the ALS requirements for operators are the same but are complied with differently. Requiring the incorporation of the new ALS requirements into the maintenance records, rather than requiring individual ALS tasks ( e.g., repetitive inspections and replacements), requires operators to record AD compliance once after updating the maintenance records, rather than after every time the ALS task is completed. In addition, paragraph (h) of this AD allows operators to incorporate later approved revisions of the ALS document as specified in the Ref. Publications section of EASA AD 2018-0132 without the need for an AMOC. ### Differences Between This AD and the EASA AD Paragraph (1) of EASA AD 2018-0132 requires compliance with actions and associated thresholds and intervals, including life limits and maintenance tasks, from the effective date of EASA AD 2018-0132. Paragraph (3) of EASA AD 2018-0132 requires incorporating the actions and associated thresholds and intervals, including life limits and maintenance tasks, into the approved maintenance program within 12 months after the effective date of EASA AD 2018-0132. This AD requires incorporating into maintenance records requirements (airworthiness limitations) within 30 days after the effective date of this AD. ### 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. Incorporating requirements (airworthiness limitations) into maintenance records would require about 2 work-hours for a cost of $170 per helicopter and a cost of $22,100 for the U.S. fleet. ### Authority for This Rulemaking Title 49 of the United States Code specifies the FAA's authority to issue rules on aviation safety. Subtitle I, section 106, describes the authority of the FAA Administrator. Subtitle VII: Aviation Programs, describes in more detail the scope of the Agency's authority. The FAA is issuing this rulemaking under the authority described in Subtitle VII, Part A, Subpart III, Section 44701: General requirements. Under that section, Congress charges the FAA with promoting safe flight of civil aircraft in air commerce by prescribing regulations for practices, methods, and procedures the Administrator finds necessary for safety in air commerce. This regulation is within the scope of that authority because it addresses an unsafe condition that is likely to exist or develop on products identified in this rulemaking action. ### Regulatory Findings This AD will not have federalism implications under Executive Order 13132. This AD will not have a substantial direct effect on the States, on the relationship between the national government and the States, or on the distribution of power and responsibilities among the various levels of government. For the reasons discussed above, I certify that this AD: (1) Is not a “significant regulatory action” under Executive Order 12866, (2) Will not affect intrastate aviation in Alaska, and (3) Will not have a significant economic impact, positive or negative, on a substantial number of small entities under the criteria of the Regulatory Flexibility Act. ### The Amendment Accordingly, under the authority delegated to me by the Administrator, the FAA amends 14 CFR part 39 as follows: ## Affected data sheets (1) (OpenAirDocs) The type certificate data sheets whose models the AD names. - [TCDS R00002RD](https://openairdocs.org/tcds/R00002RD): Leonardo S.p.a.; names 2 of 2 models: AW139, AB139 ## Registered aircraft it may apply to (OpenAirDocs) Matched by airframe and engine model; the AD's applicability may narrow it by serial number, part number or equipment. - Aircraft: 165 (165 by airframe model, 0 by engine model) - Makers: Agustawestland Philadelphia 99, Agusta 22, Agusta Aerospace 21, Leonardo 13, Leonardo Helicopters US 6, Agustawestland 3, Leonardo S P A 1 Models with the most aircraft: - [Agustawestland Philadelphia AW139](https://openairdocs.org/model/agustawestland-philadelphia-aw139): 99 aircraft (airframe model) - [Agusta Aerospace AW139](https://openairdocs.org/model/agusta-aerospace-aw139): 21 aircraft (airframe model) - [Agusta AW139](https://openairdocs.org/model/agusta-aw139): 14 aircraft (airframe model) - [Leonardo AW139](https://openairdocs.org/model/leonardo-aw139): 13 aircraft (airframe model) - [Agusta AB139](https://openairdocs.org/model/agusta-ab139): 8 aircraft (airframe model) - [Leonardo Helicopters US AW139](https://openairdocs.org/model/leonardo-helicopters-us-aw139): 6 aircraft (airframe model) - [Agustawestland AW139](https://openairdocs.org/model/agustawestland-aw139): 3 aircraft (airframe model) - [Leonardo S P A AB139](https://openairdocs.org/model/leonardo-s-p-a-ab139): 1 aircraft (airframe model) All 8 models: https://openairdocs.org/ad/2022-02-12/models.md Every aircraft: https://openairdocs.org/ad/2022-02-12/aircraft.md ## Related documents - [Proposed rule FAA-2021-0964](https://openairdocs.org/proposed/FAA-2021-0964): Notice of proposed rulemaking (NPRM), published Nov 12, 2021 Its text cites no advisory circulars or STCs. --- OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.