ATLANTA, GA, USA
N1851S
BEECH B200
WHILE AT CRUISE WITH RECOMMENDED POWER SETTINGS, THE LEFT ENGINE OIL PRESSURE AND TORQUE INDICATIONS BEGAN FLUCTUATING AND DROPPING. AS THE POWER LEVER WAS RETARDED A POPPING SOUND WAS HEARD AND THE ENGINE WAS SHUT DOWN. A PRECAUTIONARY LANDING WAS MADE IN ATLANTA. ENGINE DISASSEMBLY DISCLOSED A FAILURE OF THE NO. 1 BEARING. BLADE TIP FEATHERING WAS NOTED ON THE FIRST AND SECOND STAGE COMPRESSOR BLADE TIPS, AS WELL AS ON THE IMPELLER STAGE. THE OIL NOZZLE WAS UNOBSTRUCTED. PRATT AND WHITNEY HAD OBTAINED A NEW VENDOR FOR THE BEARING, WHICH HAD 113 HOURS IN SERVICE AT THE TIME OF THE FAILURE.
Source: NTSB Aviation Accident Database
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