Airworthiness Directive · Amendment 39-10551 · Saab Model SAAB 340B and SAAB 2000 Series Airplanes
Saab Model SAAB 340B and SAAB 2000 Series Airplanes
Model SAAB 340B series airplanes, serial numbers 240 through 430 inclusive; Model SAAB 2000 series airplanes, serial numbers 002 through 050 inclusive, and 052; certificated in any category.
This amendment adopts a new airworthiness directive (AD), applicable to certain Saab Model SAAB 340B and SAAB 2000 series airplanes, that requires modification of the check valves of the airfoil de-icing system, or replacement of the check valves with improved valves. 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 failure of the check valves, which could result in loss of airfoil de- icing capability during single engine operation, and consequent reduced controllability of the airplane.
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.
