As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER BLOCKING IN AT GATE, THE L1 DOOR WAS WAS UNABLE TO BE DISARMED, THE HANDLE WOULD NOT MOVE. MAINTENANCE ENTERED VIA L2 DOOR. WHILE L1 DOOR WAS OPENED BY MAINTENANCE, THE SLIDE DROPPED FROM ITS ENCLOSURE AND JAMMED AGAINST JETWAY. INSTALLED L1 DOOR EMERGENCY EVACUATION SLIDE ASSY. OPS CK GOOD.