What was found
THE AIRCRAFT WAS AT 41,000 FEET WHEN IT HAD A LOSS OF CABIN PRESSURIZATION. THE CABIN WAS CLIMBING AT A RATE OF 800 FEET PER MINUTE. THE FLIGHT CREW DESCENDED THE AIRCRAFT TO AN ALTITUDE OF 8,000 FEET AND PROCEEDED TO THE DESTINATION. UPON INSPECTION OF THE OUTFLOW AND SAFETY VALVE P/N 130406-1, IT WAS FOUND THAT THE SAFETY VALVE HAS CRACKED. BOTH THE SAFETY AND OUTFLOW VALVE ARE RESTRICTED TO 41,000 FEET BY AD-95-20-03, SUPERSEDES (94-26-01).