What was found
MAIN ENTRY DOOR HISS ON CLIMB OUT, DOOR OPENED IN FLIGHT UPON RETURN TO AIRPORT. NO DEFECTS WERE NOTED WITH THE DOOR LATCHING/WARNING SYS. NTSB INVESTIGATION IN PROGRESS, AWAITING CVR SUMMARY.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
MAIN ENTRY DOOR HISS ON CLIMB OUT, DOOR OPENED IN FLIGHT UPON RETURN TO AIRPORT. NO DEFECTS WERE NOTED WITH THE DOOR LATCHING/WARNING SYS. NTSB INVESTIGATION IN PROGRESS, AWAITING CVR SUMMARY.