What was found
CLT - FLT 1079 - EN ROUTE FROM MDT TO CLT WHILE DESCENDING FROM 350 TO 310, AIRCRAFT EXPERIENCED A LOSS OF CABIN PRESSURE. A RAPID DESCENT TO 10,000 FEET WAS MADE. MASKS DID NOT DROP. FLIGHT LANDED WITHOUT FURTHER INCIDENT. MAINTENANCE REPLACED THE NR 1 AUTO PRESSURE CONTROLLER, PRIMARY AND SECONDARY OUTFLOW VALVES AND PERFORMED A HULL LEAK CHECK. (M)