As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON TAKEOFF THE PILOT REPORTED THAT THEY HAD A PRIMARY TRIM FAILURE AND A MACH TRIM OFF INDICATION. THE PRIMARY TRIM FAILURE WAS DUE TO THE FACT THAT THE PILOT IN COMMAND DID NOT TURN ON THE MACH TRIM. WE PERFORMED A FUNCTIONAL CHECK OF THE SYSTEM AND FOUND THAT SYSTEM HAD NO FAULTS.