FlightFinder
Check my flight
Casualties unknown

Helicopter Strikes Terrain During Night FLIR Training (N9179F)

Antonia, MO, US

On November 19, 1993, a Hughes 369HS (registration N9179F) operated by Drug Enforcement Admin. was involved in an aviation accident near Antonia, MO. Investigators recorded the probable cause as: THE PILOT'S FAILURE TO MAINTAIN PROPER ALTITUDE. A FACTOR WAS THE DARK NIGHT. 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

During a night FLIR training maneuver, a helicopter descended below planned altitude, touched down inadvertently, then executed an abrupt recovery resulting in a rollover and terrain impact. No mechanical failure was found.

Event Details

During a night FLIR (Forward Looking Infrared) training operation, the helicopter was maneuvering when it descended below the planned maneuvering altitude and inadvertently contacted the terrain. The pilot's reaction to this unintended touchdown was described as an abrupt recovery.

Witness Observations

According to witnesses, the pilot initiated an abrupt recovery with a steep right turn, which caused the helicopter to enter the trees. Subsequently, the helicopter rolled inverted and impacted the terrain.

Investigation Findings

The investigation found no mechanical failure or malfunction of the airframe, powerplant, or flight controls. The helicopter's descent below the planned altitude and subsequent contact with terrain were not attributed to any mechanical issues.

Loss of control in flight

Frequently asked questions

What happened in the 19 Nov 1993 Hughes 369HS accident near Antonia, MO?

During a night FLIR training maneuver, a helicopter descended below planned altitude, touched down inadvertently, then executed an abrupt recovery resulting in a rollover and terrain impact. No mechanical failure was found.

What aircraft was involved and where did it happen?

The accident on 19 Nov 1993 involved a Hughes 369HS, registration N9179F, operated by Drug Enforcement Admin., at Antonia, MO.

What was the probable cause of the accident?

THE PILOT'S FAILURE TO MAINTAIN PROPER ALTITUDE. A FACTOR WAS THE DARK NIGHT.

More accident analyses

Investigation report by the U.S. National Transportation Safety Board (NTSB) historical archive. Original record: https://carol.ntsb.gov/event/20001211X13716. This page is a structured re-presentation; facts and quotes are in the National Transportation Safety Board (NTSB), United States.