What was found
FOAM DOOR HINGE COVER HAD BECOME UNVELCROED AND GOT STUCK IN DOOR DURING CLOSING. DOOR WAS LOWERED AND AND PIECE OF FOAM WAS REMOVED. DOOR CLOSED NORMALLY. ON DEPARTURE, HEARD LOUD HISS FROM DOOR SEAL AND PRESSURIZATION WAS NOT ON SCHEDULE. STAYED AT 10000' AND BURNED FUEL. CABIN PRESSURE VARIED FROM 5100 TO 1500. AFTER LANDING, FOUND LARGE HOLE IN DOOR SEAL WHERE CHUNK OF FOAM TRIM WAS LODGED EARLIER. CORRECTIVE ACTION: REMOVED DAMAGED DOOR SEAL PN: 600-31913-1 AND INSTALLED CUSTOMER SUPPLIED NEW DOOR SEAL PN: 600-31913-1 IN REF TO CL-650 AMM 52-11-29, OPS CHECK GOOD. THIS CLEARS AOG