As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SHIP 3817 UPON ARRIVAL AT THE GATE THE GATE AGENT WAS UNABLE TO OPEN THE L1 DOOR. SHE SAID THE HANDLE WOULD NOT "BUDGE". INSIDE DOOR HANDLE OPERATES NORMALLY. CORRECTIVE ACTION: CLEANED AND LUBRICATED L1 DOOR OPENING MECHANISM PER B737 AMM 52 -12 .(5011753).