Airworthiness Directive · Amendment 39-12762 · Eurocopter Deutschland Model EC135 Helicopters
Eurocopter Deutschland Model EC135 Helicopters
Model EC135 helicopters with Turbomeca Arrius 2B1 engines installed, certificated in any category.
This amendment adopts a new airworthiness directive (AD) for Eurocopter Deutschland (Eurocopter) Model EC135 helicopters with Turbomeca Arrius 2B1 engines installed. This action requires modifying the engine electrical control unit (FADEC) software and the collective linear transducer (LVDT). This amendment is prompted by a parameter discrepancy within the engine fuel main metering unit that is transmitted to the FADEC. This condition, if not corrected, could result in deactivation of the engine main fuel-metering valve, loss of automatic control of the affected engine, and subsequent loss of control of the helicopter.
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.
