As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ATTEMPTED AUTOLAND WAS UNSUCCESSFUL WITH APP ARMED AND AUTOPILOT A ENGAGED, AUTOPILOT B WOULD NOT ENGAGE. GROUNDED - YES. FOUND C/B FCC B ENGAGE INTERLOCK C/B OUT ON P6-2. RESET REF B737-800 AMM 20-60-01 AND WD 22-11-12 PG 3. C/B REMAINED SET. FCC B OPS NML REF AMM 22-11-00. LAND VERIFY TEST PASS REF AMM 22-11-00. ETOPS GND VERIFICATION TEST SUCCESSFUL.