Airworthiness Directive · Amendment 39-15881 · Turbomeca Arriel 1B, 1D, 1D1, 2B, and 2B1 Turboshaft Engines
Turbomeca Arriel 1B, 1D, 1D1, 2B, and 2B1 Turboshaft Engines
Superseded. A later AD replaced this one: AD 2009-08-08 R1. Comply with the one in force.
This AD applies to:
(1) Turbomeca Arriel 1B, 1D, and 1D1 turboshaft engines with the power turbine modules M04 installed, as listed by serial number (SN) in Figure 1 of Turbomeca Alert Mandatory Service Bulletin (MSB) No. A292 72 0827, Version A, dated March 20, 2009; and
(2) Turbomeca Arriel 2B, and 2B1 turboshaft engines with the power turbine modules M04 installed, as listed by SN in Figure 1 of Turbomeca Alert MSB No. A292 72 2833, Version A, dated March 20, 2009.
(3) These engines are installed on, but not limited to, Eurocopter AS 350 B, AS 350 BA, AS 350 B1, AS 350 B2, 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) For engines with an affected Module M04 (PT module) which has accumulated 1,000 total PT cycles or more on the effective date of this AD, remove the PT blades from service before further flight.
(2) For engines with an affected Module M04 (PT module) which has accumulated fewer than 1,000 total PT cycles on the effective date of this AD, remove the PT blades from service before accumulating 1,000 total PT cycles.
(3) After the effective date of this AD, do not install any PT blades removed as specified in paragraph (e)(1) or (e)(2) of this AD, into any engine.
Although the compliance section of EASA AD No. 2009-0068-E, dated March 25, 2009, states to replace the Module M04, or PT wheel assembly, or PT blades, this AD states to remove the PT blades from service.
(g) Although EASA AD No. 2009-0068-E, dated March 25, 2009, applies to the Arriel 2B1A engine, this AD does not apply to that model because it has no U.S. type certificate.
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.
