CESSNA 172N near Hillsville, VA — 2009-09-13

Probable cause

The total loss of engine power for an undetermined reason.

NTSB narrative

The student pilot stated that, while on the base leg, the engine stopped and she made a forced landing in a field one quarter of a mile from the airport. The carburetor heat was in use at the time of the loss of power. Examination of the airplane by a Federal Aviation Administration inspector revealed that the flight control system components, engine, and system components showed no evidence of preimpact mechanical malfunction. The current ambient temperature was 73 degrees Fahrenheit, with a dew point of 57 degrees Fahrenheit. Review of the carburetor icing probability chart revealed that serious carburetor icing could occur at glide power.

Analysis

Primary failure mode

Engine power loss

First missed decision gate

Pilot could have checked fuel levels or engine performance before approach.

NTSB coding

• Loss of engine power (total) · Approach-VFR pattern base

Evidence available

• 4 docket documents

Docket documents4

• Other Pertinent Forms and Reports-Carbice Chartform
• Other Pertinent Forms and Reports-Record of conversation student pilotform
• Pilot/Operator Aircraft Accident Report, NTSB Form 6120.1form
• Reports from Federal Agencies-Inspector Statementinterview

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