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Engine Power Loss Leads to Stall and Impact During Forced Landing Attempt (N7591X)

Phillips, ME, US

On October 4, 2001, a Cessna 172B (registration N7591X) was involved in an aviation accident near Phillips, ME. Investigators recorded the probable cause as: Loss of engine power due to a blockage of the left fuel tank vent line with mud, and the subsequent inadvertent stall. This summary draws on records from the U.S. National Transportation Safety Board (NTSB) historical archive.

Sourcesthe U.S. National Transportation Safety Board (NTSB) historical archivePrimary reportUpdated 2026-07-04Data APIEditorial standards

An airplane experienced two engine power losses during a forced landing and go-around, resulting in a stall and ground impact. Investigation found mud contamination in a fuel vent and a mixture of fuel types.

Incident Overview

Approximately 30 minutes after departure, the airplane's engine suffered a total loss of power. The pilot initiated a forced landing procedure, selecting a field for the landing. During the final approach, the engine unexpectedly regained full power. The pilot executed a go-around, but shortly thereafter, the engine lost power a second time. The airplane subsequently entered a low altitude power-off stall and impacted the ground.

Examination Findings

Post-accident examination of the airplane revealed that the left fuel vent line was contaminated with mud. Additionally, analysis of the fuel drained from the airplane showed it contained a mixture of auto gas, 100LL aviation fuel, and a fuel additive.

Aerodynamic stall

Frequently asked questions

What happened in the 4 Oct 2001 Cessna 172B accident near Phillips, ME?

An airplane experienced two engine power losses during a forced landing and go-around, resulting in a stall and ground impact. Investigation found mud contamination in a fuel vent and a mixture of fuel types.

What aircraft was involved and where did it happen?

The accident on 4 Oct 2001 involved a Cessna 172B, registration N7591X, at Phillips, ME.

What was the probable cause of the accident?

Loss of engine power due to a blockage of the left fuel tank vent line with mud, and the subsequent inadvertent stall.

More accident analyses

Investigation report by the U.S. National Transportation Safety Board (NTSB) historical archive. Original record: https://carol.ntsb.gov/event/20011019X02119. This page is a structured re-presentation; facts and quotes are in the National Transportation Safety Board (NTSB), United States.