As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
MACH TRIM FAIL ILLUMINATED WHEN MASTER RECALL IS PUSHED. LIGHT GOES OUT WHEN RESET. GROUNDED - YES. PERFORMED DFCS BITE REF B737-800 FIM 22-11 TASK 801. FOUND FAULT CODE 22-11317. ACCOMPLISHED FIM 22-14 TASK 801 AND LRU REPLACEMENT TEST REF FIM 22-11 TASK 802. ALL TESTS PASS AND NO MAINTENANCE MSG SHOWN. NO F/D FLAG OR MACH TRIM/ SPEED TRIM ON RECALL. A/C OK FOR SERVICE.