What was found
AIRCRAFT WAS GROUNDED: VENT SKIN VALVE FAULT AFTER TAKEOFF FOLLOWED BY BLOWER FAULT. UNABLE TO PRESSURIZE CABIN. FLIGHT RETURNED TO PHL. REMOVED AND REPLACED SKIN AIR OUTLET VALVE IAW AMM 21-26-53.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
AIRCRAFT WAS GROUNDED: VENT SKIN VALVE FAULT AFTER TAKEOFF FOLLOWED BY BLOWER FAULT. UNABLE TO PRESSURIZE CABIN. FLIGHT RETURNED TO PHL. REMOVED AND REPLACED SKIN AIR OUTLET VALVE IAW AMM 21-26-53.