As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING AFTER START CHECKLIST FLOW, THE "MACH TRIM FAIL" LIGHT ILLUMINATING DURING MASTER CAUTION RECALL. GROUNDED - YES. CYCLED POWER PER AMM 20-60-99 ALL OPS RESTORED. ACCOMPLISHED DFCS BITE SHOWS NO FAULTS MACH TRIM SYS TEST PASSES, BOTH CHANNELS PER FIM 22-11 TASK 801.