Andrew McKimmon DR-1 Triplane near Geneseo, NY — 2011-07-09

Probable cause

A total loss of engine power due to carburetor icing.

NTSB narrative

The pilot was maneuvering the airplane about 600 feet above ground level during an airshow. The engine lost power, the pilot attempted a forced landing in a corn field, and the airplane flipped over. The pilot reported that he completed the engine power-loss checks after the engine lost power. After recovery of the wreckage, impact-related engine damage was repaired and the engine was reinstalled on the airframe. Two test runs were completed, and the engine ran normally during both runs. The airplane was being operated in conditions conducive to serious carburetor icing at glide power at the time of the accident.

Analysis

Primary failure mode

Engine power loss

First missed decision gate

Pilot could have checked for carburetor icing before flight.

NTSB coding

• Loss of engine power (total) · Maneuvering-low-alt flying
• Carburetor Icing Conditions

Evidence available

• 3 docket documents

Docket documents3

• Pilot/Operator Aircraft Accident Report, NTSB Form 6120.1form
• Excerpt from SAIB CE-09-35 Carburetor Icing Chartother
• TSB Record of Engine Inspectionother

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