Airworthiness Directive · Amendment 39-13842 · Saab Model SAAB SF340A and SAAB 340B Series Airplanes
Saab Model SAAB SF340A and SAAB 340B Series Airplanes
This AD applies to certain Saab Model SAAB SF340A series airplanes, line numbers 004 through 159 inclusive; and SAAB 340B series airplanes, line numbers 160 through 459 inclusive; certificated in any category.
The FAA is adopting a new airworthiness directive (AD) for certain Saab Model SAAB SF340A and SAAB 340B series airplanes. This AD requires an inspection of the elevator and aileron trim-tab fittings, and related investigative/corrective actions if necessary. This AD is prompted by reports of improperly installed rivets in the retainers that hold the elevator trim-tab bearings. We are issuing this AD to prevent the elevator and aileron trim-tab bearings from coming loose, which could result in excessive play in the elevator and aileron trim systems, and reduced controllability of the airplane.
You are responsible for having the actions required by this AD performed within the compliance times specified, unless the actions have already been done.
Within 800 flight hours or 6 months after the effective date of this AD, whichever is first: Do a detailed inspection of the elevator and aileron trim-tab fittings, and all applicable related investigative and corrective actions, by accomplishing all of the actions in the Accomplishment Instructions of Saab Service Bulletin 340-51-025, Revision 01, dated October 21, 2003. Any related investigative and corrective actions must be done before further flight.
Note 1: For the purposes of this AD, a detailed inspection is: “An intensive examination of a specific item, installation, or assembly to detect damage, failure, or irregularity. Available lighting is normally supplemented with a direct source of good lighting at an intensity deemed appropriate. Inspection aids such as mirror, magnifying lenses, etc., may be necessary. Surface cleaning and elaborate procedures may be required.”
As of the effective date of this AD, no person may install on any airplane an elevator or aileron trim-tab fitting unless it has been inspected, and any applicable corrective actions have been done, in accordance with paragraph (f) of this AD.
Although the service bulletin referenced in this AD specifies to submit certain information to the manufacturer, this AD does not include that requirement.
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
