As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED. DIVERTED CLT ACCOUNT OF VENT SKIN VALVE FAULT INDICATION, AFTER TAKE OFF. CREW DECLARED AN EMERGENCY AND LANDED OVERWEIGHT WITHOUT INCIDENT. MAINTENANCE REPLACED SKIN AIR VALVE PER AMM 21-26-53 (SEE ALSO AALA201705029048).