As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ABE/CLT - FLT 1125 - SHORTLY AFTER TAKEOFF, THE AIRCRAFT WOULD NOT PRESSURIZE PROPERLY. NO EMERGENCY WAS DECLARED. THE FLIGHT DIVERTED TO PHL. FLIGHT LANDED AT PHL WITHOUT FURTHER INCIDENT. MAINTENANCE FOUND THE FORWARD EQUIPMENT DOOR WAS NOT SEALED PROPERLY. REMOVED AND REINSTALLED DOOR. FLIGHT OPERATED TO CLT WITH NO PRESSURIZATION PROBLEMS. (X)