Airworthiness Directive · Amendment 39-11031 · Saab Model SAAB SF340A and SAAB 340B Series Airplanes
Saab Model SAAB SF340A and SAAB 340B Series Airplanes
Model SAAB SF340A series airplanes, serial numbers 004 through 159 inclusive; and Model SAAB 340B series airplanes, serial numbers 160 through 453 inclusive; as specified in Saab Service Bulletin SAAB 340-71-057, Revision 02, January 26, 1999, including Attachment 1, dated January 20, 1999; certificated in any category.
This amendment adopts a new airworthiness directive (AD) that is applicable to certain Saab Model SAAB SF340A and SAAB 340B series airplanes. This action requires a review of the airplane maintenance records to identify the bottom engine vibration isolator, an inspection of the aft engine vibration isolator to determine whether the deflection is within limits, and various follow-on actions. This amendment is prompted by issuance of mandatory continuing airworthiness information by a foreign civil airworthiness authority. The actions specified in this AD are intended to prevent excessive engine vibration, which could lead to damage of the nacelle structure and result in reduced structural integrity and fire shielding capability of the nacelle structure, or which could lead to chafing of the fire sensor loop and a consequent nuisance fire warning and result in a precautionary engine shutdown.
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
