What was found
(CAN) DURING CRUISE AT FL320, CABIN RATE STARTED TO CLIMB AT 1500 FPM. CREW (CARGO FIT) DONED O2 MASKS. PRESSURIZATION CONTROLLER SELECTED TO (MANUAL) AND (STBY), NO CHANGE. CARGO HEAT OUTFLOW VALVE CLOSED, RECOVERED PRESSURE. O2 REMOVED, FLIGHT CONTINUED WITHOUT FURTHER INCIDENT. MAINTENANCE CLEANED DOOR SEALS OF DEBRIS AND CARRIED OUT PRESSURIZATION CONTROL TEST IAW MM 21-31-00 AND FOUND SERVICEABLE. (TC NR 20070202003)