As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLIGHT 5036 - PAX DOOR CAUTION MESSAGE. ONCE LEVEL AT 3000 FT OVBD AND INBD COOL FAIL CAME ON. RETURNED TO BOS AND FLIGHT LANDED WITHOUT INCIDENT. INSPECTED PAX DOOR ASSY, NO DEFECTS FOUND. EXCESSIVE GREASE FOUND ON INNER HANDLE. PURGED AND SERVICED HANDLE MECHANISM. PERFORMED OPS CHECK OF PAX DOOR.