What was found
(CAN) ON DEPARTURE, THE FLIGHT CREW REPORTED THEY HAD LOST THE AUTOPILOT, MACH TRIM AND THE STAB TRIM. NR 1 STAB TRIM SWITCH WAS NOTICED TO BE STICKY AND HARD TO DISENGAGE. THE CREW WAS ADVISED THAT IT WAS PROBABLY THE NR 1 (CAPT'S) DISENGAGE SW (P/N 996-0013) AT FAULT AND CAUSING BOTH CHANNELS TO DISENGAGE AND THAT THE SWITCH NEEDED TO BE REPLACED. THE CREW CONTINUED ON IN A SLIGHTLY NOSE UP ATTITUDE AND THE AUTOPILOT UNSERVICEABLE. THE AIRCRAFT LANDED WITHOUT FURTHER INCIDENT AND THE SWITCH (P/N 996-0013) HAS BEEN REPLACED (TC NR 20060309001)