What was found
CABIN ALTITUDE WARNING HORN SOUNDED WHILE CLIMBING THROUGH 33,000 FT. QRH PROCEDURE STABILIZED CABIN ALT IN MANUAL MODE, PACKS ON HIGH. PACKS IN AUTO WOULD NOT HOLD CABIN ALTITUDE. PERFORMED AN UNSCHEDULED LANDING IN PHX. BITE TEST DCPC FOUND FAULT 030, TROUBLESHOT AND FOUND AFT WHEEL WELL PRESSURE SEAL TORN. REPLACED PRESSURE SEAL REF M/M 36-13-01. PRESSURIZED PNEUMATIC SYSTEM, NO LEAKS NOTED. PERFORMED CABIN PRESSURE LEAK TEST REF M/M 05-51-91, TEST PASSED. PRESSURIZATION SYSTEM OPS CHECKS NORMAL.