Casualties unknown

1991-08-16: Grumman G-164A (N8577H) — Robinson Bros Flying Service — Allport, AR

Allport, AR, US

On August 16, 1991, a Grumman G-164A (registration N8577H) operated by Robinson Bros Flying Service was involved in an aviation accident near Allport, AR. Investigators recorded the probable cause as: The investigation found no cause for the loss of power at engine examination. 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

During an aerial application flight, the pilot lost engine power while approaching the field for a pass and landed in a bean field with no cause found at examination.

What happened

The incident occurred during an aerial application mission. As the pilot approached the designated field to begin his first spray pass, the airplane began to lose altitude unexpectedly. Upon realizing that the aircraft was settling below the surrounding tree line and would not maintain safe clearance, the pilot attempted to recover by applying full power to the engine.

Unfortunately, the engine did not respond to the throttle input. With no further options available to regain altitude or reach a suitable landing area, the pilot executed an emergency landing in a nearby bean field. The aircraft came to rest in the crop without further incident regarding the landing itself, but the loss of power during the approach phase was critical.

The investigation

Following the accident, investigators conducted a thorough examination of the airplane's engine to determine the root cause of the power loss. The inspection focused on mechanical components and systems that could have contributed to the failure during flight.

Despite the detailed examination, no mechanical defects or anomalies were identified that would explain the sudden loss of power. The engine appeared to be in normal condition upon post-accident inspection, leaving the specific cause of the power failure undetermined based on physical evidence alone.

Probable cause

The investigation found no cause for the loss of power at engine examination.

Investigation report by the U.S. National Transportation Safety Board (NTSB) historical archive. Original record: https://carol.ntsb.gov/event/20001212X17856. This page is a structured re-presentation; facts and quotes are in the National Transportation Safety Board (NTSB), United States.