What was found
"A" AUTO PILOT WILL NOT ENGAGE IN CMD A. "B" AUTO PILOT WORKS NORMALLY. ACFT GROUNDED. UNABLE TO DUPLICATE DEFECT, DFCS BITE IAW FIM 22-11 TASK 801 SHOWED FAULTS 22-11281 A/P DISC SW INPUT INV. AND 22-11251 AFCS ENGAGE INTERLOCK, EACH LOGGED THREE TIMES ON LEG 16. ACCOMPLISHED TROUBLESHOOTING FOR FAULT 22-11251 IAW FIM 22-13 TASK 821 AND FOR FAULT 22-11281 IAW FIM 22-11, TASK 809 - INITIAL EVALUATION (DFCS BITE) DID NOT CONFIRM FAULTS. PERFORMED DFCS LIBRARY TEST 58 AND LIBRARY TEST 62, NO DEFECTS NOTED. FCC-A ENGAGE INTERLOCK CIRCUIT BREAKER REMAINED CLOSED. PERFORMED DFCS GROUP 49 TEST IAW AMM 22-11-00-700-801 - ALL TESTS PASS.