As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
BWI - FLT 1435 - AFTER TAKEOFF, CREW WAS UNABLE TO PRESSURIZE AIRCRAFT. FLIGHT RETURNED TO FIELD AT BWI AND LANDED WITHOUT FURTHER INCIDENT. NO EMERGENCY WAS DECLARED. MAINTENANCE FOUND THE E/E DOOR SEAL OUT OF POSTION. REPOSITIONED E/E DOOR SEAL AND LUBED. PRESSURIZATION CHECK GOOD. (X)