As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED. EMERGENCY DECLARED. DURING APPROACH WHEN FLAPS 5 SELECTED FLAPS REMAINED AT 1. DURING ALTERNATE FLAP EXTENSION AN ASYMMETRY DEVELOPED WITH LEFT FLAP AT 12 AND RIGHT FLAP AT 14. REMOVED AND REPLACED LEFT WING FLAP POSITION TRANSMITTER AND ACCOMPLISHED SATISFACTORY OPERATIONAL CHECK IAW AMM 27-58-00.