Airworthiness Directive · Amendment 39-21775 · Electrical power system
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 a short circuit caused by chafing of the electrical wiring in the overhead panel. This AD requires an initial detailed inspection inside the overhead panel for certain helicopters, repetitive detailed inspections inside the overhead panel for all helicopters, and corrective actions if necessary, as specified in a 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.
Except as specified in paragraph (h) of this AD: Comply with all required actions and compliance times specified in, and in accordance with, European Union Aviation Safety Agency (EASA) AD 2021-0044, dated February 5, 2021 (EASA AD 2021-0044).
(1) Where EASA AD 2021-0044 refers to its effective date, this AD requires using the effective date of this AD.
(2) The “Remarks” section of EASA AD 2021-0044 does not apply to this AD.
(3) Where EASA AD 2021-0044 refers to flight hours (FH), this AD requires using hours time-in-service.
(4) Where paragraphs (3) and (5) of EASA AD 2021-0044 refer to “any discrepancy,” for this AD, discrepancies include chafing of the cable harnesses or incorrect clearance between the anchor nuts/screws and the cable harnesses, incorrect length of the screws, inadequately bonded supports, and poor condition of the white protective tape.
Although EASA AD 2021-0044 and the service information referenced in EASA AD 2021-0044 specify to submit 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
