What was found
DIVERSION/DECLARED EMERGENCY. CLIMBING THROUGH 29,000FT, THE CABIN ALTITUDE HIT 10,000 FEET AND ACTIVATED THE CABIN ALTITUDE HORN. AS WE DESCENDED THE CABIN ALTITUDE DESCENDED, IT WAS PRESSURIZING, BUT NOT HOLDING PRESSURIZATION WELL. FOUND BOTH OUTFLOW VALVES FAULTY. REMOVED AND REPLACED BOTH SUPPLY DUCT VALVES AND THE NR 2 ENGINE 115 VALVE FAULTY IAW AMM.