Airworthiness Directive · Amendment 39-22499 · Engine
Safran Helicopter Engines, S.A. (Type Certificate Previously Held by Turbomeca, S.A.) Engines
This AD applies to all Safran Helicopter Engines, S.A. (Type Certificate previously held by Turbomeca, S.A.) Model Arriel 1C, Arriel 1C1, Arriel 1C2, and Arriel 1K1 engines.
The FAA is superseding Airworthiness Directive (AD) 2023-01- 12, which applied to all Safran Helicopter Engines, S.A. (Safran) Model Arriel 1C, Arriel 1C1, and Arriel 1C2 engines. AD 2023-01-12 required replacing affected fire detectors and prohibited installation of affected fire detectors. Since the FAA issued AD 2023-01-12, the FAA has determined that Model Arriel 1K1 engines are also affected by the unsafe condition. This AD is prompted by reports of false engine fire warnings. This AD requires replacing the affected fire detectors, prohibits installation of affected fire detectors, and adds Model Arriel 1K1 engines to the applicability, as specified in an European Union Aviation Safety Agency (EASA) AD, which is incorporated by reference (IBR). 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: Perform all required actions within the compliance times specified in, and in accordance with European Union Aviation Safety Agency (EASA) AD 2023-0110, dated May 26, 2023.
(1) Where the “Reference Date” for Model Arriel 1K1 engines in Table 1 of EASA AD 2023-0110 specifies “The effective date of this [EASA] AD,” this AD requires using the effective date of this AD.
(2) Where the “Reference Date” for Model Arriel 1C, Arriel 1C1, and Arriel 1C2 engines in Table 1 of EASA AD 2023-0110 specifies “02 January 2023,” this AD requires compliance before further flight.
(3) This AD does not adopt the Remarks paragraph of EASA AD 2023-0110.
(4) Although the service information referenced in EASA AD 2023-0110 specifies to discard any removed fire detectors, this AD requires removing those parts from service.
Although the service information referenced in EASA AD 2023-0110 specifies to submit certain information to the manufacturer, this AD does not include that requirement.
