What was found
AIRCRAFT NOT GROUNDED. AFTER TAKEOFF THE AIRCRAFT WOULD NOT PRESSURIZE. RETURNED TO STATION EWR. FOUND SKIN AIR OUTLET VALVE MAIN FLAP NOT FULLY CLOSED. INSTALLED SERVICEABLE SKIN AIR OUTLET VALVE (22HQ) PER AMM 21-26-53.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
AIRCRAFT NOT GROUNDED. AFTER TAKEOFF THE AIRCRAFT WOULD NOT PRESSURIZE. RETURNED TO STATION EWR. FOUND SKIN AIR OUTLET VALVE MAIN FLAP NOT FULLY CLOSED. INSTALLED SERVICEABLE SKIN AIR OUTLET VALVE (22HQ) PER AMM 21-26-53.