As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHILE DOING LEFT & RIGHT ELEVATOR TAB FREE PLAY CHECK, FOUND ON BOTH ELEVATOR TRIM TABS THAT BOLT HEADS ARE FACING INBOARD NOT OUTBOARD. *S/D* HARDWARE WAS INSTALLED INCORRECTLY. REMOVED AND INSTALLED HARDWARE IN CORRECT CONFIGURATION.