As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT 473 SAN - JFK DIVERTED TO LAX, LOUD AIR LEAK NOISE FROM 1L DOOR AND NO PRESSURIZATION. FOUND 1L DOOR AFT EDGE NOT FULLY CLOSED. INSPECTED DOOR AND SEAL, CYCLE SEVERAL TIMES, PRESSURIZED ACFT, AND ALL CHECK NORMAL. NO PARTS REQUIRED.