As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) DURING FLIGHT, ABOUT 22:45 HRS. THE FRONT LEFT DOOR OPENED BY ABOUT 1.THE PILOTS CHECKED THE DOOR AFTER RETURNING TO SEPT-ILES. NO DEFECT FOUND, BUT NOTED THAT THE DOOR HANDLE HAD TO BE PUSHED ALL THE WAY TO REALLY LOCK THE DOOR. THERE IS NO SYSTEM TO CONFIRM THE LOCKING OTHER THAN FOR THE PILOT. MAINTENANCE ADVISED THE PILOTS.