What was found
AT CRUISE, FL 330 ENGINE A/I ON NR 3 ENGINE STARTED TO COMPRESSURE STALL. TURNED IGNITION ON, ENGINE STOPPED STALLING. AFTER FIVE MINUTES, CREW TURNED IGNITION OFF. THE ENGINE STARTED STALLING AGAIN. THE CREW SECURED THE NUMBER THREE ENGINE. CREW REPORTED THAT THE FIRE HANDLE WOULD NOT GO TO OR PAST FUEL, AIR AND HYDRAULIC SHUTOFF POSITION. AIRCRAFT DIVERTED TO PHX. MAINTENANCE REPLACED THE PRESSURE RATIO BLEED CONTROL VALVE, IAW DC8 MM 75- 30-03. MAINTENANCE PERFORMED AN ENGINE RUN. NO COMPRESSURE STALLS WERE NOTED. MAINTENANCE INSPECTED RIGGING OF EMERGENCY SHUTDOWN SYSTEM IAW DC8 MM 76-20-0. NO DISCREPANCIES WERE NOTED, OPS CHECKED GOOD.