As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
IN EWR AFTER FLT 257, LEFT FORWARD PAX/CREW ENTRANCE DOOR (L1) GUST LOCK FAILED TO ENGAGE. UPON FURTHER INSPECTION, FOUND DEBRIS IN DOOR GAS ROD BUSHING (WHICH CAUSED ROD TO BIND ON BUSHING). CLEARED DEBRIS AND FREED UP DOOR GAS ROD AND GUST LOCK MECHANISM OPERATED NORMALLY. OPERATIONALLY CHECKED THE OPENINING IAW AMM 52-10-00-010-001 AND THE CLOSING IAW AMM 52-10-00-410-001. AIRCRAFT RETURNED TO SERVICE.