As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ACFT RETURNED DUE TO THE PRESSURIZATION FLOW LIGHT TURNED ON WHEN ACFT REACHED FL 330. THE OPERATIONAL PROCEDURES NOT CONTROLLED THE CABIN PRESSURE SO IT WAS REQUIRED TO RETURN TO DEPARTURE. ACFT WAS SENT TO THE HANGAR AND MX PERSONNEL REPLACED THE LT REGULATING PRESSURE VALVE IAW MM 21-31-00, ALL CORRECT. THE OVERWEIGHT INSP WAS NOT NECESSARY DUE TO THE ACFT LANDED WITH 62,950 KILOGRAMS AND THE MAXIMUM LANDING WEIGHT IS 63,276 KILOGRAMS.