What was found
DIVERTED FLIGHT - 2/4/01 - EN ROUTE SJC TO PHX, FL 290 ACFT EXPERIENCED A RAPID DEPRESSURIZATION; ALT ALERT HORN SOUNDED 10000 FT, CLIMBING 2000-3000 FPM; OXYGEN MASKS DEPLOYED, RAPID DESCENT MADE; UNEVENTFUL LANDING AT FAT. TECHS SENT FROM PHX TO TROUBLESHOOT. DURING PRESS TEST, EQUIP COOLING EXHAUST VALVE FAILED; ALL OTHER CHECKS GOOD. REPLACED EQUIP COOLING VALVE, FERRIED TO PHX FOR REPLACEMENT OF USED OXYGEN GENERATORS, REPACKING OF OXYGEN MASKS. DURING THE FLIGHT TO PHX THE PRESSURIZATION SYSTEM OPERATED NORMALLY. CABIN PRESSURE REPLACED, PRECAUTION. TWO MASK FAILED TO DROP (FWD F/A & ROW 23 RT). REPLACEMENT OF PASSENGER OXYGEN GENERATOR AND ALL FUNCTIONED NORMALLY.