What was found
STL - DURING CRUISE, CABIN PRESSURE BEGAN CLIMBING WITHOUT ABILITY TO CONTROL, AND PASSENGER OXYGEN MASK DEPLOYED. THE FLIGHT MADE AN UNSCHEDULED LANDING. REPLACED BOTH OUTFLOW VALVES, (P/N 103280-5-1), AUTO PRESSURE CONTROLLER, (P/N 763810-1), AND MANUAL PRESSURE CONTROLLER, (P/N 131046-1). OPS CHECKS NORMAL. CHECK C-1 - 10-18-94 - MCI. REF 95ZZZW266, 95ZZZW267, 95ZZZW268.