As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING ROUTINE INSPECTION NOTED THAT CENTER REAR FLAP ROLLER ON LEFT FLAP WAS NOT ROLLING AS FLAP MOVED. REMOVED AND FOUND SEVERAL NEEDLE BEARINGS MISSING AND ONE SIDE OF ROLLER WAS FLAT. NO REASON FOR DEFECT COULD BE FOUND. NO DAMAGE TO FLAP TRACK.