Airworthiness Directive · Amendment 39-17223 · Agusta S.p.A. Helicopters
Agusta S.p.A. Helicopters
This AD applies to Agusta S.p.A. A109S.
The models as the FAA's AD index lists them. The serial ranges, installed parts and exceptions are in the AD itself: read it at the FAA.
We are adopting a new airworthiness directive (AD) for Agusta S.p.A. (Agusta) Model A109S helicopters to require modifying the electrical power distribution system to carry a higher electrical load. This AD was prompted by an electrical failure on an Agusta Model A109E helicopter that resulted from ``inadequate functioning of the 35 amperes (amps) BATT BUS circuit breaker.'' The actions of this AD are intended to require modifying the electrical power distribution system to prevent failure of the circuit breaker, loss of electrical power to instruments powered by the ``BATT BUS'' system, 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.
Aircraft
