As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LGA-FLIGHT 3704 CREW REPORTED PASSENGER DOOR WILL NOT OPEN. MAINTENANCE FOUND THREADED BUSHING MISSING ON HANDRAIL ASSEMBLY. INSTALLED INTERIM REPAIR ON DOOR. DOOR OPERATES NORMALLY. AIRCRAFT RETURNED TO SERVICE. CORRECT BUSHING INSTALLED LATER THAT DAY.