No fatalities

Helicopter Yaws Left During Student Approach to Hover

Cahokia, IL, United States

On January 22, 2018, a HELICOPTERES GUIMBAL CABRI G2 NO SERIES operated by D H HELICOPTER INC was involved in an aviation accident near Cahokia, IL. No fatalities were reported. Investigators recorded the probable cause as: The student pilot's failure to maintain yaw control while landing in gusting crosswind conditions and the flight instructor's delayed remedial action. This summary draws on records from NTSB; 7 related events involving the same aircraft type or operator are linked below.

SourcesNTSBPrimary reportUpdated 2026-08-03Data APIEditorial standards

A helicopter flight instructor and student were performing an approach to a hover in gusting winds. The student failed to apply sufficient right pedal input, causing a rapid left yaw and subsequent rollover. Substantial damage occurred; no mechanical issues reported.

Incident Overview

During a training flight, a helicopter flight instructor and a student pilot were conducting a normal approach to a hover. The wind was reported as a quartering gusting headwind. According to the instructor, he reminded the student of the need to anticipate right pedal input as they applied power to terminate to a hover.

Sequence of Events

The student pilot did not add sufficient right pedal input. Consequently, the helicopter immediately and very rapidly yawed to the left. The flight instructor said, "my controls" and attempted to recover, but the helicopter continued to spin counterclockwise. It touched down and rolled onto its right side.

Damage and Findings

The helicopter sustained substantial damage to the fuselage and main rotor system. Both the flight instructor and student reported that there were no preaccident mechanical failures or malfunctions with the helicopter that would have precluded normal operation. The automated weather observation system at the airport recorded, about the time of the accident, wind from 170° at 11 knots, gusting to 22 knots. The student pilot had attempted to hover on runway 12L.

Contributing factors

Causes

Yaw control — Not attained/maintainedStudent/instructed pilotInstructor/check pilot

Other contributing factors

Effect on operation