Casualties unknown

Aerial Application Aircraft Crashes After Engine Power Loss (N9703J)

Saint Charles, MO, US

On July 15, 1996, a Cessna A188B (registration N9703J) was involved in an aviation accident near Saint Charles, MO. Investigators recorded the probable cause as: The pilot's inability to maintain adequate airspeed during an attempt to climb over trees following a partial loss of engine power, which resulted in an impact with terrain. 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

During aerial application maneuvers, the pilot experienced a partial loss of engine power. Unable to clear trees due to airspeed loss and unable to jettison cargo, the aircraft impacted terrain.

What happened

The incident occurred while the pilot was engaged in routine aerial application maneuvers. During this phase of flight, the pilot observed a partial loss of engine power. In an attempt to maintain altitude and clear surrounding obstacles, the pilot attempted to climb over nearby trees. However, the aircraft was unable to gain sufficient height due to a critical loss of airspeed.

With no option to safely divert or continue climbing, the pilot found himself unable to jettison the chemical load carried in the aircraft. Consequently, the aircraft impacted the terrain with significant force. The impact resulted in substantial damage to the airframe.

The investigation

Following the accident, investigators examined the aircraft to determine the root cause of the power loss. A thorough inspection was conducted on the engine components and the chemical dump valve system. The examination revealed no mechanical discrepancies or anomalies with the engine itself. Additionally, the dump valve was found to be functioning correctly, ruling out a mechanical failure in the cargo release mechanism as a contributing factor.

Probable cause

The pilot's inability to maintain adequate airspeed during an attempt to climb over trees following a partial loss of engine power, which resulted in an impact with terrain.

Investigation report by the U.S. National Transportation Safety Board (NTSB) historical archive. Original record: https://carol.ntsb.gov/event/20001208X06176. This page is a structured re-presentation; facts and quotes are in the National Transportation Safety Board (NTSB), United States.