Casualties unknown

2004-03-12: Robinson R22 (N4370D) — Collective Helicopter Corp — Keystone, FL

Keystone, FL, US

On March 12, 2004, a Robinson R22 (registration N4370D) operated by Collective Helicopter Corp was involved in an aviation accident near Keystone, FL. Investigators recorded the probable cause as: The inadequate supervision by the flight instructor by allowing the student to lose excessive altitude resulting in a skid impacting the ground and subsequent roll over of the helicopter. This summary draws on records from the U.S. National Transportation Safety Board (NTSB) historical archive; 8 related events involving the same aircraft type or operator are linked below.

Sourcesthe U.S. National Transportation Safety Board (NTSB) historical archivePrimary reportUpdated 1781061362Data APIEditorial standards

During a training flight, a helicopter rolled over after the instructor took over control during a steep turn maneuver. The helicopter touched down with a lower right skid, resulting in a rollover. The instructor reported no mechanical failures.

Incident Overview

A certified flight instructor and a student were conducting a training flight in a helicopter. The instructor permitted the student to perform one additional steep turn before returning to the hangar. During the final steep turn, the student lost more altitude than in previous maneuvers.

Sequence of Events

As the student lost altitude, the instructor assumed control of the helicopter. However, during the subsequent touchdown, the helicopter touched down with the right skid lower than the left, accompanied by forward left lateral movement. This resulted in the helicopter rolling over.

Mechanical Status

The flight instructor stated that there were no mechanical failures or malfunctions with the helicopter or any of its systems prior to the accident.

Investigation report by the U.S. National Transportation Safety Board (NTSB) historical archive. Original record: https://carol.ntsb.gov/event/20040407X00425. This page is a structured re-presentation; facts and quotes are in the National Transportation Safety Board (NTSB), United States.