Pilot Debrief

SHOREY TIMOTHY A PRECEPTOR STOL KING near North Pole, AK — 2012-07-07

Final reportANC12LA068
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Date
2012-07-07
Location
North Pole, AK, USA
Airport
AK22
Aircraft
SHOREY TIMOTHY A PRECEPTOR STOL KING
Registration
N919WP
Category
Airplane
Highest injury
None
Fatalities
0
Phase of flight
Approach

Probable cause

A total loss of engine power due to a binding drive belt while in the airport traffic pattern.

NTSB narrative

The pilot reported that she was on a postproduction check flight of a recently completed experimental homebuilt airplane. She said that while on the downwind leg in the traffic pattern, the engine sputtered, the cylinder head and exhaust gas temperatures began to rise, and the engine lost power. During the subsequent emergency descent, the airplane struck a power pole and power lines, and then flipped and impacted the ground tail first. Postaccident examination of the engine revealed that one of the two drive belts for the gear reduction drive had fallen off of the pulley and showed evidence of binding.

Analysis

Primary failure mode
Engine power loss
First missed decision gate
Pilot could have aborted the flight after engine issues on downwind leg.

NTSB coding

Evidence available

  • 1 docket document
View NTSB final reportView NTSB docket

Docket documents1

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