PRODUCT: All Saab AB, Saab Aerosystems Model 340A (SAAB/SF340A) and SAAB 340B airplanes. SUBJECT: Airworthiness Directive 2012-13-01 ACTION: Final Rule
SUMMARY: This AD was prompted by reports indicating that wear of the elevator pushrods has occurred on some airplanes after extended time in service. This AD requires determining if a certain part number is installed, performing a detailed inspection for individual play between the elevator pushrod assembly and degradation of elevator pushrod assembly, and replacing the affected elevator pushrod assembly with a new elevator pushrod assembly if necessary. The FAA is issuing this AD to prevent a free elevator from affecting the pitch control authority, which may result in reduced controllability of the airplane.