What was found
COULD NOT PRESSURIZE CABIN ON TAKE OFF. NOTICED LOUD SQUEAL ON LOWER L1 DOOR, ACFT LANDED IN ORIGINATING AIRPORT WITHOUT DIFICULTY.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
COULD NOT PRESSURIZE CABIN ON TAKE OFF. NOTICED LOUD SQUEAL ON LOWER L1 DOOR, ACFT LANDED IN ORIGINATING AIRPORT WITHOUT DIFICULTY.