Airworthiness Directive · Amendment 39-21905 · Fuel controlling system
Leonardo S.p.a. Helicopters
This AD applies to Leonardo S.p.a. Model AB412 and AB412 EP helicopters, certificated in any category.
The FAA is adopting a new airworthiness directive (AD) for all Leonardo S.p.a. Model AB412 and AB412 EP helicopters. This AD was prompted by a report that certain oil and fuel check valves are susceptible to cracking. This AD requires determining whether the affected oil and fuel check valves are installed, visually inspecting the oil and fuel check valves for any crack, and depending on the inspection results, removing certain parts from service. This AD also requires removing affected parts from service and installing serviceable parts, and prohibits the installation of affected parts 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 2021-0126, dated May 10, 2021 (EASA AD 2021-0126).
(1) Where EASA AD 2021-0126 refers to its effective date, this AD requires using the effective date of this AD.
(2) The “Remarks” section of EASA AD 2021-0126 does not apply to this AD.
(3) Where EASA AD 2021-0126 refers to flight hours (FH), this AD requires using hours time-in-service (TIS).
(4) Where paragraph (1) of EASA AD 2021-0126 specifies “inspect the helicopter in accordance with the instructions of Part I of the applicable ASB to determine if the helicopter is Group 1 or Group 2,” for this AD replace “in accordance with the instructions of Part I of the applicable ASB” with “in accordance with the Accomplishment Instructions, Part I, paragraphs 2. through 3.2 of the of the applicable ASB.”
(5) Where paragraph (2) of EASA AD 2021-0126 specifies “inspect each affected part in accordance with the instructions of Part II of the applicable ASB,” for this AD replace “in accordance with the instructions of Part II of the applicable ASB” with “in accordance with the Accomplishment Instructions, Part II, paragraphs 3. and 3.1 of the applicable ASB.”
Although the service information referenced in EASA AD 2021-0078 specifies to submit certain information to the manufacturer, this AD does not include that requirement.
