As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ACFT DEPARTED, COULD NOT PRESSURIZE ABOVE 4.0 DIFFERENTIAL AT ALL ALTITUDES. ACFT RETURNED TO FIELD. CREW ALSO REPORTS FRONT DOOR SEAL UPPER AFT LEAKS. SEALED AIRFRAME LEAKS IN FORWARD BULKHEAD AND WINDSHIELD, OPS. CHECKED PRESSURIZATION SYS IAW MM 21-30-00. CHECKS GOOD.