As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
12 HOURS AFTER THE AIRCRAFT CAME BACK FROM A PAINT JOB, A FLIGHT INSTRUCTOR HEARD A BANG AS THEY WERE RETRACTING THE FLAPS AFTER LANDING. AFTER TAXIING BACK TO THE HANGAR, AND UPON SUBSEQUENT INSPECTION, OUR FLIGHT INSTRUCTOR REPORTED THE LT IB AFT FLAP ROLLER MISSING.