What was found
90 MINUTES AFTER TAKEOFF, AT 34,000 FT, RED CABIN ALTITUDE WARNING AND BELL SOUNDED. CABIN ALT SHOWED 10,000 FT WITH CABIN ALTITUDE CLIMBING AT 800-1000 FT/MIN. PRESS CHECK LIST ACCOMPLISHED, MASKS DEPLOYED AND CREW DECLARED A PAN PAN. FLIGHT DESCENDED TO 8,000 FT, FLIGHT DIVERTED. FOUND DUCT OFF ACM TO HEAT EXCHANGER DUE TO ACM DUCT COUPLING FLEXIBLE RESTRAINTS PULLED THROUGH ACM LUG. REF IPC 21-51-01-10 ITEMS 330, 345, 425, 360. P/N 2203924-1 COOLING PACK DUCT , PN 2202323-4 DUCT, MFR: PN 5652 SEAL, PN 2203925-1 TUBE, OTHER PACK WAS ON INOP ON MEL.