What was found
DURING CLIMB-OUT FROM FT SMITH, ARKANSAS, THE MASTER WARNING AND LEFT ENGINE OIL PRESSURE WARNINGS ILLUMINATED. THE LEFT PROPELLER GEARBOX OIL PRESSURE INDICATOR SHOWED LARGE FLUCTUATIONS (0-75 PSI). THE FLIGHT CREW FOLLOWED THE EMERGENCY CHECKLIST AND SHUT DOWN THE ENGINE. DECLARED AN EMERGENCY THROUGH RAZORBACK APPROACH AND RETURNED TO FT SMITH SINGLE ENGINE. THE LANDING WAS UNEVENTFUL AND THERE WERE NO INJURIES. MX FOUND AND REPAIED A BROKEN WIRE MID-SPAN BETWEEN THE PROPELLER GEARBOX OIL PRESSURE TRANSDUCER AND THE LEFT ENGINE FIREWALL CANNON PLUG. (M)