As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(LOG 6493726) AFTER GATE RETURN L1 DOOR SLIDE WAS NOT DISARMED AND DOOR WAS OPENED. SLIDE CAME OFF DOOR.PINNED SLIDE VALVE FOR SAFETY WIP 979058 REF B737 AMM 25-66.REMOVED & REPLACED L1 SLIDE IAW B737 AMDS TASK CARD 2560-4425.RII COMPLETED WITH.