What was found
ON CLIMB-OUT, AIRCRAFT WOULD NOT PRESSURIZE AND RETURNED TO BASE. CARGO DOOR SEAL INFLATION VALVE WAS FOUND TO HAVE ICE IN ITS CONTROL LINE. THE LINE WAS THAWED AND PURGED. NO FURTHER PROBLEMS WERE NOTED.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
ON CLIMB-OUT, AIRCRAFT WOULD NOT PRESSURIZE AND RETURNED TO BASE. CARGO DOOR SEAL INFLATION VALVE WAS FOUND TO HAVE ICE IN ITS CONTROL LINE. THE LINE WAS THAWED AND PURGED. NO FURTHER PROBLEMS WERE NOTED.