As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
YEG - FLIGHT 2529 - AFTER TAKEOFF NOTICED EXTERNAL AC POWER DOOR LEFT OPEN. RETURNED TO THE FIELD AND ACCOMPLISHED A UNEVENTFUL LANDING. MAINTENANCE FOUND THE DOOR OPEN, INSPECTED THE AREA AND FOUND NO DAMAGE, CLOSED DOOR. AIRCRAFT RETURNED TO SERVICE. NO PARTS REPLACED.