As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING DESCENT CHECK "SPEED TRIM FAIL" ILLUMINATED ON RECALL, EXTINGUISHED WHEN MASTER CAUTION RESET WAS PRESSED. FOLLOWED QRH, CONTINUED NORMAL OPERATIONS. GROUNDED - YES. PERFORMED DFCS BITE PER B737-800 FIM 22-11-TASK 801. CHANNEL A AND B TEST PASSED - NO FAULTS.