What was found
AIRCRAFT WAS GROUNDED: DURING CLIMB OUT A VENT SKIN VALVE FAULT MESSAGE DISPLAYED, AN EMERGENCY WAS DECLARED AND THE AIRCRAFT RETURNED TO LAX WHERE IT LANDED SAFELY WITHOUT FURTHER INCIDENT. **ORIGINAL REPORT WAS AALA202208299218** MAINTENANCE REPLACED SKIN AIR OUTLET VALVE PER AMM 21-26-25. IN ADDITION, MAINTENANCE ALSO FOUND THE SKIN AIR OUTLET DUCT RUPTURED AND REPLACED IT PER AMM 21-26-42. (AALA202208307455) A SATISFACTORY LEAK / OPERATIONAL CHECK WAS ACCOMPLISHED WITH NO FAULTS BEING NOTED.