As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
MACH TRIM FAIL LIGHT ILLUMINATED ON ARRIVAL TO ACFT, PARTIALLY CONFIGURED L250 KTS. ACFT GROUNDED. DFCS BITE LEG 1 BOTH A AND B CHANNELS FAULT MACH TRIM ACTUATOR IAW AMM 22-11-00. PERFORMED AMM FIM TASK 22-13 TASK 816 MACH TRIM FAIL LIGHT PROBLEM. TESTED NORMAL. OK FOR SERVICE. NO RECENT HISTORY.