As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: 210 KNOTS, DURING FLAP EXTENSION FROM 0 TO 1 A TRAINING EDGE FLAP ASYMMETRY OCCURRED AND THE FLAPS STOPPED MOVING. EMERGENCY WAS DECLARED AND AIRCRAFT LANDED WITHOUT INCIDENT. MAINTENANCE REPLACED FLAP SKEW SENSOR-4 T528 IAW AMM 27-59-01 AND FIM 27-59-00.