As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT 1249 BOS-IAD, ON GROUND - THE FLIGHT CREW REPORTED L1 DOOR WOULD NOT DISARM. MX ENTERED A/C FROM R1 DOOR AND FOUND L1 DOOR PARTIAL OPEN WITH GIRT BAR ATTACHED TO FLOOR. RE-INSTALLED GIRT BAR TO DOOR. VISUAL INSP OF DOOR MECHANISM AND SLIDE NO DEFECTS NOTED. SLIDE LACING INTACT. PERFORMED OPS CHECK OF DOOR OPENING AND ARM SYSTEM AS PER AMM 25-65-01, FOUND OK.