As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) AFTER START UP PILOT NOTICED THE CARGO DOOR LIGHT WAS ON. HE SHUT DOWN AND CONFIRMED THE DOOR WAS CLOSED, THEN ADVISED MAINTENANCE OF THE PROBLEM. THE DOOR HANDLE SWITCH LEVER ROLLER SPRING WAS FOUND BENT. THE SPRING WAS STRAIGHTENED AND ADJUSTED. AFTER PERFORMING FUNCTIONAL TESTS THE AIRCRAFT WAS RETURNED TO SERVICE.