AERONCA 7AC near Auburn, ME — 2009-07-11

Probable cause

A loss of engine power due to fuel contamination. Contributing to the accident was the inadequate maintenance inspection of the airplane and engine's fuel system.

NTSB narrative

The pilot stated that they were at 2,800 ft agl, when the engine lost all power. He tried to restore power by applying carburetor heat, but was unsuccessful. He subsequently made a forced landing on a golf course, and the airplane flipped over inverted. Further examination of the airplane by a Federal Aviation Administration (FAA) inspector revealed that dirt and rust contamination was found in the gascolator, carburetor fuel bowl, and carburetor nozzles.

Analysis

Primary failure mode

Fuel management

First missed decision gate

Pilot could have ensured adequate fuel before flight.

NTSB coding

• Fuel contamination · Enroute-cruise
• Maintenance

Evidence available

• Photos
• 4 docket documents

Docket documents4

• Other Pertinent Forms and Reports-Record of Conversation N2871Eform
• Pilot/Operator Aircraft Accident Report, NTSB Form 6120.1form
• Photo 1-gascolator contaminationphotos
• Photo 2-FAA fuel bowl contaminationphotos

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