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NTSB Report
June 25, 2025 · American Eurocopter AS350B3 · N3951A
San Luis, AZ
Overview
Report Status
Probable Cause
Event Type
Accident
Date
June 25, 2025
Injury Outcomes
No injuries (2 uninjured)
Location
San Luis, AZ
Aircraft
American Eurocopter AS350B3 (2010)
Tail Number
N3951A
Operator
Us Department of Homeland Security
Injuries
None
Aircraft Damage
Substantial
NTSB Number
WPR25LA189
According to the operator, the instructor and pilot receiving instruction were conducting hover autorotation training over cement that was visually obstructed by a hard packed dirt surface. On the third autorotation, the pilot under instruction established a hover at a slightly higher altitude than the previous two practice iterations. During recovery, the pilot receiving instruction executed the appropriate procedures, but the helicopter began to settle faster than expected and he was unable to sufficiently reduce the rate of descent. Subsequently, the helicopter landed hard and resulted in substantial damage to the tail boom. The operator reported no preaccident mechanical malfunctions or failures with the airplane that would have precluded normal operation.
NTSB Probable Cause
The pilot receiving instruction’s failure to properly recover the helicopter during an autorotative landing and the instructor pilot’s failure to intervene, which resulted in a hard landing.
Full Narrative
According to the operator, the instructor and pilot receiving instruction were conducting hover autorotation training over cement that was visually obstructed by a hard packed dirt surface. On the third autorotation, the pilot under instruction established a hover at a slightly higher altitude than the previous two practice iterations. During recovery, the pilot receiving instruction executed the appropriate procedures, but the helicopter began to settle faster than expected and he was unable to sufficiently reduce the rate of descent. Subsequently, the helicopter landed hard and resulted in substantial damage to the tail boom. The operator reported no preaccident mechanical malfunctions or failures with the airplane that would have precluded normal operation.
Flight
Event TypeAccident
Event Time09:50 MST
Nearest AirportRollie Airfield (0nm)
Runway17/3
Runway Length2800 ft
Runway Width60 ft
Flight Plan FiledCvfr
Flight Plan ActivatedYes
Aircraft FireNo
Aircraft ExplosionNo
Aircraft
AircraftAmerican Eurocopter AS350B3
Tail NumberN3951A
Aircraft CategoryHeli
DamageSubstantial
OperatorUs Department of Homeland Security
Engines1
Engine TypeTurboshaft
Engine DetailsSafran · Arriel 2B1 · Turboshaft · 847
Seats6
People & Injuries
Injury SummaryNo injuries (2 uninjured)
Fatal0
Serious0
Minor0
Uninjured2
Total2
Crew 1Age 26 · First Class · None
Crew 2Age 36 · Second Class · None
Conditions
ConditionsVMC
LightDaylight
WindCalm
Visibility10 sm
CeilingNone
Temperature / Dew Point39 F
Altimeter29.89 inHg
Observation Time09:57
Weather SourceWFAC