Engine power loss during climb-out leads to aircraft impact

Casualties unknown • Chugiak, AK, US

An aircraft experienced an unexpected engine power loss shortly after takeoff, resulting in an impact on frozen terrain near the runway.

What happened

Following an intersection takeoff with approximately 1,960 feet of runway remaining, the pilot began a climb. When the aircraft reached an altitude of approximately 20 to 30 feet above ground level, the pilot reduced power, at which point the engine lost power without warning.

Uncertain if the aircraft could clear an ahead fence, the pilot executed a left turn of approximately 110 degrees. The aircraft subsequently impacted relatively flat, frozen terrain. Following the impact, the aircraft slid 96 feet and came to rest approximately 175 feet east of the runway. The pilot was not injured.

The investigation

The broken carburetor was removed and disassembled during the investigation. No noticeable contamination or preimpact part failure was identified. An operational check of the engine was performed, which showed the engine started and operated without any problems that would have caused the accident.

Findings

At the time of the accident, the temperature was 36 degrees and the dew point was 27 degrees. According to carburetor ice charts, these atmospheric conditions were conducive to carburetor ice.

Probable cause

The engine lost power due to the formation of carburetor ice under favorable atmospheric conditions.

Frequently asked questions

What happened in the 1989-04-04 Piper PA-18 accident near Chugiak, AK?

An aircraft experienced an unexpected engine power loss shortly after takeoff, resulting in an impact on frozen terrain near the runway.

What aircraft was involved and where did it happen?

The accident on 1989-04-04 involved a Piper PA-18, registration N8677C, operated by Charles H. Dowrick, at Chugiak, AK.

What was the probable cause of the accident?

The engine lost power due to the formation of carburetor ice under favorable atmospheric conditions.

Investigation report by the U.S. National Transportation Safety Board (NTSB) historical archive. Original record: https://carol.ntsb.gov/event/20001213X28010. This page is a structured re-presentation; facts and quotes are in the National Transportation Safety Board (NTSB), United States.

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