Casualties unknown

1987-03-05: Piper PA-11 (N4724M) — Nenana, AK

Nenana, AK, US

On March 5, 1987, a Piper PA-11 (registration N4724M) was involved in an aviation accident near Nenana, AK. Investigators recorded the probable cause as: The pilot's loss of control due to an engine failure during initial climbout, which he attributed to insufficient engine pre-heating in cold weather conditions. 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 1781061362Data APIEditorial standards

A pilot experienced an engine failure during initial climbout in freezing temperatures, leading to a loss of control and a crash onto a frozen lake. The pilot attributed the malfunction to insufficient engine pre-heating.

What happened

The aircraft departed from the airport and encountered difficulties during the initial phase of flight. According to the pilot's account provided during the subsequent interview, the engine ceased functioning while the aircraft was in the climbout phase. At the time of the incident, the ambient temperature was recorded at -5 degrees Fahrenheit.

Following the loss of power, the pilot lost control of the aircraft. The plane stalled and subsequently crashed onto a nearby frozen lake. The pilot stated that he believed the engine failure was caused by insufficient pre-heating of the engine prior to takeoff.

The investigation

NTSB investigators interviewed the pilot to gather details regarding the sequence of events leading up to the accident. The investigation focused on the mechanical status of the aircraft and the environmental conditions at the time of the crash. No further mechanical examination details were provided in the source text.

Findings

The primary factor contributing to the accident was the engine failure during climbout. The pilot identified insufficient engine pre-heating as the likely cause, given the extreme cold temperature of -5 degrees Fahrenheit. This mechanical failure led directly to a loss of control and a stall.

Safety message

This incident highlights the critical importance of proper engine preparation in cold weather operations. Pilots must ensure adequate pre-heating time for aircraft engines when operating in freezing temperatures to prevent potential fuel or oil system issues that can lead to engine failure.

Probable cause

The pilot's loss of control due to an engine failure during initial climbout, which he attributed to insufficient engine pre-heating in cold weather conditions.

Investigation report by the U.S. National Transportation Safety Board (NTSB) historical archive. Original record: https://carol.ntsb.gov/event/20001213X30345. This page is a structured re-presentation; facts and quotes are in the National Transportation Safety Board (NTSB), United States.