As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING 100-HOUR INSPECTION, FOUND LEFT AILERON DIRECT CABLE TURNBUCKLE NOT SAFETIED. THE TURNBUCKLE IS NOT VISIBLE WITH THE HEADLINER INSTALLED. IT WOULD HAVE BEEN UNABLE TO DETECT HAD THE HEADLINER NOT BEEN REMOVED TO REPLACE DAMAGED AILERON CABLE. RECOMMEND RE-DESIGN OF HEADLINER TO GAIN ACCESS TO CABLES DURING ROUTINE INSPECTIONS.