As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SPEED TRIM FAIL AND MACH TRIM FAIL LIGHTS CAME ON DURING RECALL CHECK AFTER ENGINE START. F/O'S FD FLAG ALSO CAME ON. VERIFIED FAULT. FCC "B" COMPUTER INOP. REPLACED FCC "B" COMPUTER. PERFORMED LRU TEST FOR FCC & LAND VERIFY TEST. HGS SENSOR TEST FOR FCC PASS.