Casualties unknown

Engine Failure and Forced Landing After Power Loss (N731PU)

Sprague, NE, US

On October 20, 1999, a Cessna A188B (registration N731PU) was involved in an aviation accident near Sprague, NE. Investigators recorded the probable cause as: Engine failure due to fouled and rusted spark plugs, and a clogged fuel filter. Factors relating to this accident were the inadequate annual inspection performed on the airplane, the trees and the ditch. 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 2026-06-10Data APIEditorial standards

A pilot reported an engine failure in flight, leading to a forced landing in trees and a ditch. Examination revealed a clogged fuel strainer and other maintenance discrepancies.

Pilot Report

The pilot stated that while flying north at approximately 20 feet above the ground, the engine stopped without any sputtering or warning. He checked the throttle and applied flaps to slow the airplane. With no suitable landing area, he deliberately entered trees and subsequently struck a ditch, which caused the aircraft to flip over.

Engine Examination

Post-accident inspection of the engine found that the bottom spark plugs were lead-fouled and rusted. No other anomalies were noted in the airplane systems. Further examination of the engine revealed that the fuel strainer filter was clogged with debris identified as dirt and rust.

Maintenance Records

Review of the airplane's maintenance records showed that several airworthiness directives applicable to the airplane had not been complied with. Additionally, several airplane system items requiring annual inspection under 14 CFR Part 43 had not been accomplished.

Investigation report by the U.S. National Transportation Safety Board (NTSB) historical archive. Original record: https://carol.ntsb.gov/event/20001212X19923. This page is a structured re-presentation; facts and quotes are in the National Transportation Safety Board (NTSB), United States.