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NTSB Report
November 8, 2023 · Helicopteres Guimbal Cabri G2 · N522TF
Claremore, OK
Overview
Report Status
Probable Cause
Event Type
Accident
Date
November 8, 2023
Injury Outcomes
No injuries (2 uninjured)
Location
Claremore, OK
Aircraft
Helicopteres Guimbal Cabri G2 (2022)
Tail Number
N522TF
Injuries
None
Aircraft Damage
Substantial
NTSB Number
CEN24LA070
The student pilot and flight instructor initiated a 90° practice autorotation. As the helicopter descended, the flight instructor took control of the helicopter to cushion the landing after the student pilot flared too high. During the attempted recovery, sufficient rotor speed was not maintained, and the helicopter experienced a hard landing. The helicopter sustained substantial damage to the tailboom. Both the student pilot and the flight instructor reported that there were no preaccident mechanical malfunctions or failures that would have precluded normal operations.
NTSB Probable Cause
The flight instructor’s failure to maintain sufficient rotor speed during a practice autorotation which resulted in a hard landing.
Full Narrative
The student pilot and flight instructor initiated a 90° practice autorotation. As the helicopter descended, the flight instructor took control of the helicopter to cushion the landing after the student pilot flared too high. During the attempted recovery, sufficient rotor speed was not maintained, and the helicopter experienced a hard landing. The helicopter sustained substantial damage to the tailboom. Both the student pilot and the flight instructor reported that there were no preaccident mechanical malfunctions or failures that would have precluded normal operations.
Flight
Event TypeAccident
Event Time12:45 CST
Nearest AirportAvian Country Estates Airport (0nm N)
Runway17
Runway Length2600 ft
Runway Width100 ft
Flight Plan FiledNone
Flight Plan ActivatedNo
Aircraft FireNo
Aircraft ExplosionNo
Aircraft
AircraftHelicopteres Guimbal Cabri G2
Tail NumberN522TF
Aircraft CategoryHeli
DamageSubstantial
Operating RulePart 91
Engines1
Engine TypeReciprocating
Engine DetailsLycoming · O-360-J2A · Reciprocating · 165
Seats2
People & Injuries
Injury SummaryNo injuries (2 uninjured)
Fatal0
Serious0
Minor0
Uninjured2
Total2
Crew 1Age 36 · Second Class · None
Crew 2Age 57 · Second Class · None
Conditions
ConditionsVMC
LightDaylight
Wind220° @ 16 kt
CeilingNone
Temperature / Dew Point32 C / 32 C
Altimeter0
Observation Time12:35
Weather SourceWFAC