As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SHIP 6821- MISC/DE - ON FINAL APPROACH WHEN ATTEMPTING TO EXTEND FLAPS TO 25 THE FLAP ASYMMETRY MSG ILLUMINATED ALONG WITH TRAILING EDGE LIGHT. CORRECTIVE ACTION: MTC FOUND FAULT FLAP ISLN VALVE MSG PRESENT. REPLACED DECOMPRESSION MODULE PRESSURE SWITCH.