What was found
PILOTS REPORTED THAT DURING CLIMB OUT THROUGHT 8,000 FT, CABIN PRESSURE CLIMBED IN A BRIEF SPIKE THEN NORMAL THROUGH 22,000 FT THE CABIN BEGAN TO DEPRESSURIZE. RATE NEVER WAS PEGGED. BEGAN A DESCENT TO 10,000 FT PRESSURE NORMALIZED. MX TROUBLESHOT THE ACFT AND REMOVED DEBRI FROM THE CARGO DOOR SEAL. MX PERFORMED PRESSURIZATION CHECK IN AUTO AND MANUAL IAW MM 21-30-00. OPS CHECK WAS GOOD.