Airworthiness Directive · Amendment 39-14925 · Turbomeca Arriel 2B1 Turboshaft Engines
Turbomeca Arriel 2B1 Turboshaft Engines
Superseded. A later AD replaced this one: AD 2007-19-09. Comply with the one in force.
This AD applies to Turbomeca Arriel 2B1 turboshaft engines. 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) Replace the HMU with a serviceable HMU before the HMU accumulates 2,000 hours-since-new, since-last-overhaul, or since-incorporation of Turbomeca Service Bulletin (SB) No. 292 73 2105; or within 30 days after the effective date of this AD, whichever occurs later.
(2) Thereafter, replace HMUs with a serviceable HMU at every 2,000 hours-since-new, since-last-overhaul, or since-incorporation of Turbomeca SB No. 292 73 2105, whichever occurs later.
(3) For the purposes of this AD, a serviceable HMU is an HMU fitted with a new constant delta P diaphragm in accordance with Turbomeca Service Bulletin No. 292 73 2818, dated October 18, 2006.
None.
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.
