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NTSB Report
July 9, 2024 · Mcdonnell Douglas Helicopter 369 FF · N540HH
Mesa, AZ
Overview
Report Status
Probable Cause
Event Type
Accident
Date
July 9, 2024
Injury Outcomes
No injuries (2 uninjured)
Location
Mesa, AZ
Aircraft
Mcdonnell Douglas Helicopter 369 FF (2012)
Tail Number
N540HH
Operator
Md Helicopters
Injuries
None
Aircraft Damage
Substantial
NTSB Number
WPR24LA239
The flight instructor reported that, the pilot receiving instruction entered a smooth and established autorotation. About 75 ft above ground level, the pilot receiving instruction began to slow the helicopter into a near- vertical decent. The flight instructor took the controls, leveled the helicopter, and it then contacted the ground. One of the skids dug into the sand, and the helicopter proceeded to roll over. During the accident sequence, the helicopter sustained substantial damage to the tail boom, horizontal stabilizer, vertical stabilizer, and the fuselage. The operator reported that there were no preaccident failures or malfunctions that precluded normal operation.
NTSB Probable Cause
The pilot receiving instruction’s failure to maintain helicopter control during autorotation, which resulted in a dynamic rollover. Contributing to the accident was the delayed remedial action from the flight instructor.
Full Narrative
The flight instructor reported that, the pilot receiving instruction entered a smooth and established autorotation. About 75 ft above ground level, the pilot receiving instruction began to slow the helicopter into a near- vertical decent. The flight instructor took the controls, leveled the helicopter, and it then contacted the ground. One of the skids dug into the sand, and the helicopter proceeded to roll over. During the accident sequence, the helicopter sustained substantial damage to the tail boom, horizontal stabilizer, vertical stabilizer, and the fuselage. The operator reported that there were no preaccident failures or malfunctions that precluded normal operation.
Flight
Event TypeAccident
Event Time09:35 MST
Nearest Airport0nm
Flight Plan FiledCvfr
Flight Plan ActivatedYes
Aircraft FireNo
Aircraft ExplosionNo
Aircraft
AircraftMcdonnell Douglas Helicopter 369 FF
Tail NumberN540HH
Aircraft CategoryHeli
DamageSubstantial
OperatorMd Helicopters
Operating RulePart 91
Engines1
Engine TypeTurboshaft
Engine DetailsRolls Royce · 250-C30 · Turboshaft · 557
Seats2
People & Injuries
Injury SummaryNo injuries (2 uninjured)
Fatal0
Serious0
Minor0
Uninjured2
Total2
Crew 1Age 231 · Unknown · None
Crew 2Age 54 · Second Class · None
Conditions
ConditionsVMC
LightDaylight
Wind170° @ 7 kt
Visibility10 sm
CeilingNone
Temperature / Dew Point10 F / 52 F
Altimeter29.85 inHg
Observation Time09:47
Weather SourceWFAC