As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
YHE FLAPS WOULD NOT EXTEND BEYOND 15 DEGREES DURING APPROACH. THE AIRCRAFT LANDED WITHOUT INCIDENT. MAINTENANCE FOUND BOTH OUTBOARD FLAP'S JACKSCREW GIMBALS DRY OF LUBRICATION. THE GIMBALS WERE LUBRICATED AND OPERATION OF THE FLAPS CHECKED GOOD.