What was found
(CAN) ON TAKEOFF AND WHEN STARTED TO PRESSURIZE LOUD NOISE COMING FROM L1 FORWARD L/H MAIN ENTRY DOOR AIRCRAFT RETURNED. LOWER HINGE CAME ADRIFT, SEAL REINSTALLED.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
(CAN) ON TAKEOFF AND WHEN STARTED TO PRESSURIZE LOUD NOISE COMING FROM L1 FORWARD L/H MAIN ENTRY DOOR AIRCRAFT RETURNED. LOWER HINGE CAME ADRIFT, SEAL REINSTALLED.