COLORADO SPRING, CO, USA
N49BP
LARS AVID FLYER
THE PILOT REPORTED HEARING TWO SUCCESSIVE LOUD EXPLOSIONS. ENGINE RPMS DROPPED FROM 6500 TO 2800-3000, AND THE ENGINE DID NOT RESPOND TO THROTTLE APPLICATION. THE PILOT MADE A NO-FLAP FORCED LANDING. WHEN HE ATTEMPTED TO FLARE WITH FULL AFT ELEVATOR, THERE WAS NO RESPONSE. CONTROL CONTINUITY WAS LATER ESTABLISHED. THE ENGINE WAS FUNCTIONALLY TESTED AND DEVELOPED FULL POWER. SUBSEQUENT ENGINE DISASSEMBLY DISCLOSED THE PISTON RINGS WERE STUCK IN THE RING GROOVES.
THE PILOT'S DELAY IN FLARING THE AIRPLANE. FACTORS WERE: (1) STUCK PISTON RINGS AND (2) THE PILOT'S FAILURE TO USE FLAPS.
Source: NTSB Aviation Accident Database
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