As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
TRAILING EDG FLAPS FAILED TO EXTEND ASYMMETRY LOCKED FLAPS AT 0-1 LANDED FLAPS UP. BRAKE COOLING PWB INDICATED NORMAL PROCEDURES AND PARK AT GATE <[01]. TROUBLE SHOT FOUND BAD #1 T/E FLAP SKEW SENSOR REMOVED AND REPLACED #1 T/E FLAP SKEW SENSOR OPS CHECKED ND TESTED NO DEFECTS FOUND REF AMM 27-59-01.