As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
EMERGENCY DECLARED. LANDING UNEVENTFUL. DURING APPROACH FLAPS FAILED TO EXTEND TO 1 WITH HANDLE AT FLAP 1. TRAILING EDGE FLAP TRANSIT LIGHT ILLUMINATED. LANDED WITH FLAPS 15 USING ALTERNATE FLAP EXTENSION. REMOVED AND REPLACED LEFT WING FLAP POSITION TRANSMITTER IAW AMM 27-58-01. PEFORMED FLAP SYSTEM OPERATIONAL TEST. SYSTEM CHECKS NORMAL. AIRCRAFT WAS GROUNDED.