What was found
AUTOPILOT B WILL NOT ENGAGE. ACFT GROUNDED. FOUND CAPTAIN`S A/P DISCONNECT SWITCH INOPERATIVE. REPLACED CAPTAIN`S A/P DISCONNECT SWITCH. INSTALLATION TEST PASSED FOR BOTH SIDES IAW AMM 22-11-41/401. FCC B REMOVED AND RE-INSTALLED FOR TROUBLESHOOTING, INSTALLATION TEST PASSED IAW AMM 22-11-33/401. DFCS LRU INTERFACE TEST FOR FOR FCC BITE GROUP 35 IAW AMM 22-11-33/401, LAND VERIFY TEST BITE GROUP 49 IAW AMM 22-11-00/201, AND HGS SENSOR TEST FOR FCC/AT IAW SMM 34-36-00/501 ALL PASSED. GROUND VERIFICATION SUCCESSFUL.