What was found
MASTER CAUTION ILLUMINATED BRIEFLY AT 1500 AGL. AT ABOUT 700 WE NOTICED ONE AUTOPILOT HAD DISENGAGED WITH NO AURAL WARNING. AUTOPILOT B. GROUNDED - YES. ACCOMPLISHED DFCS BITE IAW FIM TASK 22-11-00-810-801. NO CURRENT FAULTS IN CH A OR B. LEGS 01/02 ON CH A SHOWS MESSAGE 22-11323, SPD TRIM WARN. IAW FIM 22-14 TASK 808. ACCOMPLISHED LRU REPLACEMENT TEST FOR STAB SENS, FIM 22-11 TASK 802. OPS TEST NORMAL, NO FAULTS, NO HISTORY 90 DAYS. ACCOMPLISHED BITE LIBRARY TEST IAW AMM TASK 22-11-00-740-806, ALL LIBRARY TESTS, CHANNELS A+B, FCC REPLACEMENT TEST AMM 22-11-33-400-801. ACCOMPLISHED HGS SYSTEM AND OPS TEST IAW SMM 34-36-00. ALL REQUIRED TESTS PASSED.