Pilot Debrief

CESSNA TU206G near Puyallup, WA — 2011-03-19

Final reportWPR11LA168
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Date
2011-03-19
Location
Puyallup, WA, USA
Airport
PLU
Aircraft
CESSNA TU206G
Registration
N6169Z
Category
Airplane
Highest injury
Minor
Fatalities
0
Phase of flight
Approach

Probable cause

The pilots’ activation of the fuel boost pump while preparing to land, which was contrary to checklist procedures and resulted in a loss of engine power.

NTSB narrative

The airplane was on the downwind leg of the traffic pattern during an instructional flight, and the pilots performed the prelanding checklist, switched the fuel selector to the right tank position, and activated the fuel boost pump. According to the flight instructor, the airplane “began sinking” while on final approach for the runway. When the pilots tried to add engine power, the engine did not respond, and the airplane collided with terrain short of the runway. The manufacturer’s approved checklist for the airplane indicates that the auxiliary fuel boost pump should be in the off position before landing. A representative from the engine manufacturer reported that operating the auxiliary fuel boost pump at a low engine power setting would “flood” the engine and result in a loss of engine power. It is likely that when the pilots applied power, the engine was flooded, which resulted in the total loss of engine power. Postaccident examination of the airframe and engine revealed no preaccident mechanical malfunctions or failures that would have precluded engine operations.

Analysis

Primary failure mode
Engine power loss
First missed decision gate
Not switching off the auxiliary fuel pump before landing.

NTSB coding

Evidence available

  • 6 docket documents
View NTSB final reportView NTSB docket

Docket documents6

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