As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLIGHT CREW REPORTED PILOTS CONTROL WHEEL TRIM INTERRUPT/AUTOPILOT DISENGAGE SWITCH NOT DISCONNECTING YAW DAMPER ON FINAL APPROACH. FOUND CONTROL WHEEL SWITCH OPERATIONS NORMAL. REPLACED SVO-85C YAW DAMPER SERVO WITH OVERHAULED UNIT. ALSO, REPLACED NR 1 FCC-850 CARD WITH OVERHAULED UNIT TO CORRECT ADDITIONAL AUTOPILOT INTERMITTENT PITCH TRIM FAILURE FAULT. GROUND AND FLIGHT TESTS SATISFACTORY. (K)