No fatalities

Helicopter Tail Rotor Strikes Ground During Hover Landing Training (N6330D)

Tulsa, OK, US

On May 6, 1989, a Bell 47L (registration N6330D) operated by Allied Helicopters, Inc. was involved in an aviation accident near Tulsa, OK. No fatalities were reported. Investigators recorded the probable cause as: An unexpected control input by the student caused an overcorrection, resulting in the tail rotor striking the ground. 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 hover landing practice, a gust of wind caused the tail to pitch up, and an unexpected student control input led to an overcorrection, resulting in the tail rotor striking the ground. Damage occurred to the tail rotor, skids, and bubble canopy.

Accident Overview

A training helicopter with an instructor pilot and a beginner student was involved in an accident during hover landing practice. The incident occurred in a designated hover practice area while the aircraft was repositioning to allow another helicopter to hover out from the ramp.

Sequence of Events

The instructor reported that he allowed the student to follow him on the controls during the maneuver. As the helicopter was performing a hover landing, a gust of wind caused the tail to pitch up. In response, the student made an unexpected control input that resulted in an overcorrection. This overcorrection allowed the tail rotor to make contact with the ground.

Damage Assessment

The tail rotor struck the ground, causing damage to the tail rotor itself, the skids, and the bubble canopy. No further details about the extent of damage or any other consequences were provided in the source.

Probable Cause

The stated cause of the accident was an unexpected control input by the student that caused an overcorrection, which allowed the tail rotor to strike the ground.

Frequently asked questions

What happened in the 6 May 1989 Bell 47L accident near Tulsa, OK?

During a hover landing practice, a gust of wind caused the tail to pitch up, and an unexpected student control input led to an overcorrection, resulting in the tail rotor striking the ground. Damage occurred to the tail rotor, skids, and bubble canopy.

Were there any fatalities in the 6 May 1989 Bell 47L accident?

No fatalities were recorded in this accident.

What aircraft was involved and where did it happen?

The accident on 6 May 1989 involved a Bell 47L, registration N6330D, operated by Allied Helicopters, Inc., at Tulsa, OK.

What was the probable cause of the accident?

An unexpected control input by the student caused an overcorrection, resulting in the tail rotor striking the ground.

Investigation report by the U.S. National Transportation Safety Board (NTSB) historical archive. Original record: https://carol.ntsb.gov/event/20001213X28318. This page is a structured re-presentation; facts and quotes are in the National Transportation Safety Board (NTSB), United States.