Airworthiness Directive · Amendment 39-10663 · Aerospatiale Model ATR42 and ATR72 Series Airplanes
Aerospatiale Model ATR42 and ATR72 Series Airplanes
Model ATR42-300, -320, and -500 series airplanes, as listed in Avions de Transport Regional Service Bulletin ATR42-21- 0069, dated February 5, 1998; and Model ATR72-101, -102, -201, -202, -211, -212, and -212A series airplanes, as listed in Avions de Transport Regional Service Bulletin ATR72-21-1048, dated February 5, 1998; certificated in any category.
This amendment adopts a new airworthiness directive (AD), applicable to certain Aerospatiale Model ATR42 and ATR72 series airplanes, that requires a one-time inspection of the electromagnetic interference (EMI) filter capacitors and electronic cards of the cabin air recirculation fans to detect damage. This amendment also requires replacement of damaged components with new or serviceable parts, and modification of the cabin air assembly fans. This amendment is prompted by issuance of mandatory continuing airworthiness information by a foreign civil airworthiness authority. The actions specified by this AD are intended to prevent overheating and consequent failure of the EMI filter capacitors, which could result in emission of toxic smoke and fumes throughout the airplane, and consequent adverse effects on flight crew and passengers.
