Airworthiness Directive · Amendment 39-14162 · Turbomeca S.A. Arriel 2B Turboshaft Engines
Turbomeca S.A. Arriel 2B Turboshaft Engines
Superseded. A later AD replaced this one: AD 2005-13-25 R1. Comply with the one in force.
This AD applies to Turbomeca S.A. Arriel 2B turboshaft engines with Modification TU62A incorporated. These engines are installed on, but not limited to, Eurocopter AS350B3 helicopters.
The FAA is adopting a new airworthiness directive (AD) for Turbomeca S.A. Arriel 2B turboshaft engines with Modification TU62A incorporated. This AD results from several reports of the hydromechanical unit (HMU) acceleration controller axle sticking. This AD requires initial and repetitive inspections, cleaning, lubrication, and checks for proper operation of the HMU acceleration controller axle. We are issuing this AD to prevent loss of control of engine fuel flow in manual control mode or mixed control mode, leading to engine overspeed and in-flight engine shutdown, or uncommanded in-flight engine shutdown.
You are responsible for having the actions required by this AD performed within the compliance times specified unless the actions have already been done.
(f) Within 20 operating hours after the effective date of this AD, inspect, clean, lubricate, and check for proper operation of the HMU acceleration controller axle. Use paragraph 2 of Instructions to be Incorporated of Turbomeca Alert Mandatory Service Bulletin No. A292 73 2814, Update No. 1, dated January 11, 2005, to do these actions.
(g) Thereafter, repeat the actions specified in paragraph (f) of this AD within every 210 operating hours.
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.
