What was found
AUTOPILOT B WOULD NOT ENGAGE IN CLIMBOUT. GROUNDED - YES. FOUND "AFCS SYS B ENGAGE INTLK" C/B (P6-2 B4) OPEN. PERFORMED GVI OF C/B, NO DEFECTS NOTED, RESET C/B REF B737-800 AMM 20-60-01. PERFORMED B737-800 FIM 22-11 TASK 856, FOUND MAINTENANCE MESSAGE 22-11282, 22-11252, AND 22-11208. RAN ALL ASSOCIATED LRU TEST WITH EACH FAULT, ALL TEST PASSED. PERFORMED LAND VERIFY TEST, TEST PASSED REF AMM 22-11-00-700-801. C/B REMAINED IN ALL THROUGHOUT TROUBLESHOOTING.