As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON FLAP EXTENSION SELECTED FLAPS 5 AND FLAPS EXTENDED TO 15 WITH HANDLE IN 5 DETENT. OPERATED IN ALT TO FLAPS 20 FOR LANDING. OPENED COVERS AT CONTROL STAND FOR FLAP CONTROL LEVER AND REMOVED 2 PIECES OF PLASTIC TY RAPS AND 1 TRIM SCREW THAT WAS INTERFERING WITH THE FLAP CONTROL GEARBOX AND RVDT 1 AND REMOVED DEBRIS AND ACCOMPLISHED FLAP OPS CHECK.