Pilot Debrief

CESSNA A188B near McRae, GA — 2009-08-20

Final reportERA09LA470
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Date
2009-08-20
Location
McRae, GA, USA
Aircraft
CESSNA A188B
Registration
N4842R
Category
Airplane
Highest injury
None
Fatalities
0
Phase of flight
Maneuvering

Probable cause

A total loss of engine power due to pre-ignition/detonation as a result of a fuel control malfunction.

NTSB narrative

During an aerial application flight, the pilot noticed the engine oil temperature rise and the oil pressure decrease. The oil pressure went to zero and the engine lost all power. The pilot initiated a forced landing into a soybean field. Examination of the engine found an abnormal fuel flow through the return fitting at full rich mixture setting and a leak at the mixture shaft. Additionally, the Nos. 1 and 4 piston heads exhibited thermal erosion consistent with a pre-ignition/detonation event. This type of piston damage would elevate crankcase pressure and allow oil loss through the crankcase breather system, decreasing oil pressure and increasing oil temperature.

Analysis

Primary failure mode
Engine power loss
First missed decision gate
Pilot could have conducted a precautionary landing before engine power loss.

NTSB coding

Evidence available

  • Photos
  • 9 docket documents
View NTSB final reportView NTSB docket

Docket documents9

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