What was found
(CAN) CREW REPORTED PASSENGER DOOR WARNING MESSAGE SHORTLY AFTER TAKE OFF, A/C RETURNED TO CHIGAGO. CLEANED SENSORS AND BITE CHECK CARRIED OUT OK.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
(CAN) CREW REPORTED PASSENGER DOOR WARNING MESSAGE SHORTLY AFTER TAKE OFF, A/C RETURNED TO CHIGAGO. CLEANED SENSORS AND BITE CHECK CARRIED OUT OK.