What was found
DURING DESCENT THRU 10,000' MSL, CABIN ALTITUDE CLIMBED AT MAX RATE AND THEN DESCENDED AT MAX RATE. CABIN ALTITUDE COULD NOT BE CONTROLLED IN EITHER AUTO OR MANUAL MODES. FAIRLY STRONG BURNING RUBBER ODOR NOTED BOTH IN COCKPIT AND CABIN, NO FAULT MESSAGE ON PRESSURE CONTROLLER. F/A B REPORTED A LOUD POP BEHIND HER AS CABIN PRESSURE WAS LOST. ON INSPECTION FOUND A HOLE IN AFT CARGO DOOR SEAL. R & R CARGO DOOR SEAL REF AMM TASK 52-31-26-000-801 AND 52-31-26-400-801. FUNCTIONAL CHECKED GOOD. ALSO FOUND CANTED BULKHEAD BLOW OUT PANEL POPPED OUT. REINSTALLED BLOW OUT PANEL REF AMM TASK 25-52-01-400-802. PERFORMED TROUBLESHOOTING COMMON ODORS IN ACFT IAW MCN 62172-01, FORM M-116, PARA 1A, B2,3. NO ABNORMAL ODORS NOTED. CHECK FLIGHT SATISFACTORY. RETURNED TO SERVICE.