As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SPEED TRIM FAIL LIGHT ILLUMINATED DOES NOT EXTINGUISH WITH MASTER CAUTION. GROUNDED - YES. REALIGNMENT FROM FMC CDU AIR DATA INERTIAL REFERENCE SYSTEM AND VERIFIED SPEED TRIM FAI; LIGHT EXTINGUISHED AS PER AMM 34-21-00-820-801 AND FIM 22-11 TASK 849.