An FAA review of maintenance procedures following the August 26 crash of a Colgan Air Beech 1900D near Hyannis, Mass., has found that Raytheon service manuals incorrectly depict the installation of a key part of the airplane’s elevator trim system. The agency has issued an AD on all Beech 1900s, 1900Cs and 1900Ds, effective October 15, that requires operators to revise their manuals with a corrected illustration of the elevator trim drum assembly. Although the written instructions in the manual are correct, the illustration depicts the cable drum at 180 degrees from the proper installed position and erroneously shows the open, keyed side of the drum rather than the flat side.
The day before the Colgan Air ferry flight that ended with the death of both pilots, maintenance personnel replaced two trim-tab actuators and the airplane’s forward elevator trim cable. Two days before the January 8 crash of another Beech 1900D in Charlotte, N.C., where all 21 occupants aboard a scheduled Air Midwest flight died, a mechanic allegedly misrigged that airplane’s elevator control cable.
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