As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
UNABLE TO OPEN THE MAIN CABIN DOOR FROM INSIDE THE CABIN. WE TRIED WITH APU POWER ON AND OFF. DOOR WILL CLOSE WITH THE MOTOR NORMALLY AND LOCK. GROUND CREW WAS ABLE TO OPEN THE DOOR FROM THE OUTSIDE. FOUND BROKEN WIRE AT AC017 SPLICE. REPLACED SPLICE. OPERATIONS CHECK GOOD, IAW 680A M/M 52-10-04.