As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER TAKEOFF, ACFT DID NOT PRESSURIZE. F/A SAW DAYLIGHT AROUND PAX DOOR FLAP HANDLE. LEVELED AT 4000 FT, EMERGENCY DECLARED AND RETURNED DEPARTURE, NO EICAS INDICATIONS ON DOOR SYNOPTIC PAGE. RAN THE UNPRESSURIZED FLIGHT PROCEDURE QRH CHECKLIST THEN THE UNPRESSURIZED LANDING PROCEDURE. ADJUSTED PAX DOOR LATCH MECHANISM IAW AMM 52-11-25. PRESSURZED ACFT IAW AMM 21-31-00. OPS CHECKED GOOD.