What was found
CLT - FLT 703 - ON CLIMB-OUT FROM CLT, AT APPROXIMATELY FL240, FLIGHT LOST PRESSURIZATION. FLIGHT RETURNED TO FIELD AT CLT AND LANDED WITHOUT FURTHER INCIDENT. NO EMERGENCY WAS DECLARED. MAINTENANCE PERFORMED CABIN PRESSURE LEAKAGE TEST. FOUND EXCESSIVE LEAKAGE AT FORWARD CARGO DOOR FORWARD LOWER CORNER. FOUND PRESSURE SEAL (APPROX A 12 INCH SECTION) NOT SECURED IN RETAINER. REINSTALLED SEAL AND SECURED. PERFORMED LEAKAGE TEST AGAIN AND FOUND TO BE WITHIN LIMITS. (M)