Airworthiness Directive · Amendment 39-23262 · Electrical power system wiring
Leonardo S.p.A. Helicopters
This AD applies to all Leonardo S.p.A. Model AB139 and AW139 helicopters, certificated in any category.
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 a report of interference found in the overhead panel area between the electrical cables and adjacent connectors. This AD requires repetitively inspecting the overhead panel and, depending on the results, repairing or replacing the damaged wires. This AD also requires modifying the overhead panel on certain helicopters. The FAA is issuing this AD to address the unsafe condition on these products.
Except as specified in paragraphs (h) and (i) of this AD: Comply with all required actions and compliance times specified in, and in accordance with, European Union Aviation Safety Agency AD 2025-0094, dated April 24, 2025 (EASA AD 2025-0094).
(1) Where EASA AD 2025-0094 refers to its effective date, this AD requires using the effective date of this AD.
(2) Where EASA AD 2025-0094 requires compliance in terms of flight hours, this AD requires using hours time-in-service.
(3) Where paragraph (3) of EASA AD 2025-0094 specifies “If, during the inspection as required by paragraph (1) of this AD, any discrepancy is detected, as identified in the ASB (Alert Service Bulletin), before next flight, accomplish the applicable corrective action(s) in accordance with the instructions of Part I”, this AD requires replacing that text with “If, during the inspection as required by paragraph (1) of this AD, any discrepancy is detected, as identified in Part I of the ASB, before next flight, accomplish the applicable corrective action(s) in accordance with the instructions of Part I of the ASB”.
(4) Where paragraph (4) of EASA AD 2025-0094 specifies “If, during any inspection as required by paragraph (2) of this AD, any discrepancy is detected, as identified in the ASB”, this AD requires replacing that text with “If, during any inspection as required by paragraph (2) of this AD, any discrepancy is detected, as identified in Part II of the ASB”.
(5) Where the material referenced in EASA AD 2025-0094 specifies to contact “LHD Product Support Engineering” for repair instructions, this AD requires using a method approved by the Manager, International Validation Branch, FAA; or EASA; or Leonardo S.p.A. Helicopters' EASA Design Organization Approval (DOA). If approved by the DOA, the approval must include the DOA-authorized signature.
(6) Where the material referenced in EASA AD 2025-0094 specifies “if necessary, use a mirror and a source of light to completely inspect the area”, this AD requires replacing that text with “Use a mirror and light source to inspect the area”.
(7) This AD does not adopt the “Remarks” section of EASA AD 2025-0094.
Although EASA AD 2025-0094 specifies reporting certain information to the manufacturer, this AD does not include that requirement.
The aircraft, engines and makers this AD names, by the model designations in its text. A model listed here may still be outside the AD's serial ranges.
Aircraft
