As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AUTO PILOT B INOPERATIVE, WOULD NOT ENGAGE. CIRCUIT BREAKER P6-2 B4 TRIPPED. ACFT GROUNDED. DIGITAL FLIGHT CONTROL SYSTEM (DFCS) BITE PROCEDURE IAW AMM 22-11-00. NO AUTO PILOT DISCONNECT FAULTS FOUND. DUE TO AFCS SYSTEM B ENGAGE INTERLOCK CIRCUIT BREAKER FOUND OPEN. ACCOMPLISHED DFCS OPS TEST IAW AMM 22-11-00. ACCOMPLISHED MCP CMD/CWS INTERLOCK BITE TEST 60.58, DISENGAGE BITE LIBRARY 60.62, MACH TRIM 60.33, SPEED / STAB TRIM BITE 60.32. ALL TESTS PASSED.