Airworthiness Directive · Amendment 39-16728 · Turbomeca S.A. ARRIEL 2B and 2B1 Turboshaft Engines
Turbomeca S.A. ARRIEL 2B and 2B1 Turboshaft Engines
Superseded. A later AD replaced this one: AD 2012-18-18. Comply with the one in force.
This AD applies to Turbomeca S.A. ARRIEL 2B and 2B1 turboshaft engines not modified by TU166 modification. These engines are installed on, but not limited to, Eurocopter AS 350 B3 and EC 130 B4 helicopters.
We are adopting a new airworthiness directive (AD) for the products listed above. This AD results from mandatory continuing airworthiness information (MCAI) issued by an aviation authority of another country to identify and correct an unsafe condition on an aviation product. The MCAI describes the unsafe condition as:
Unless already done, do the following actions.
(1) Accomplish TU166 modification in accordance with the instructions specified within Turboméca Mandatory Service Bulletin (MSB) A292 72 3166 Version B, dated September 20, 2010, when the GG Turbine is replaced or when the engine or Module M03 is going through overhaul or repair, or within 1,300 cycles-in-service after the effective date of this AD, whichever occurs first.
(2) Accomplishment, before the effective date of this AD, of TU166 modification in accordance with the instructions of Turboméca MSB A292 72 3166 Version A, dated August 17, 2010, satisfies the requirement of paragraph (e)(1) of this AD.
This AD differs from the Mandatory Continuing Airworthiness Information (MCAI) and or service information by the following:
(1) European Aviation Safety Agency (EASA) AD No. 2010-0198, dated October 1, 2010, applies to the ARRIEL 2B1A engine. This AD does not apply to that model because it has no U.S. type certificate.
(2) EASA AD No. 2010-198 has a compliance date of “but no later than 25 months after the effective date of this AD. This AD has a compliance time of “1,300 cycles-in-service,” based on average fleet usage data supplied by Turbomeca.
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.
