As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CATERERS PARTIALLY OPENED DOOR FOUR RIGHT, WITH DOOR ARMED, CAUSING SLIDE TO FALL OFF. *S/D* 757 HAS AN EMERGENCY ASSIST CYLINDER TO OPEN DOOR IN EMERGENCY (WITH SLIDE ARMED). AMIS WRITE UP IMPROPERLY REPORTED PARTIAL OPENING OF DOOR. SLIDE WAS BLOWN AND OPERATED NORMALLY. EMERGENCY RESERVOIR BOTTLE WAS REPLACED. DOOR SLIDE ASSY WAS REINSTALLED. OPS CHECK WAS OK. ALL CHECKS WERE OK.