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NTSB Report
October 8, 2024 · Agustawestland Spa AW109SP · N631HC
Kamas, UT
Overview
Report Status
Probable Cause
Event Type
Accident
Date
October 8, 2024
Injury Outcomes
1 injury (1 minor injury), 2 uninjured
Location
Kamas, UT
Aircraft
Agustawestland Spa AW109SP (2013)
Tail Number
N631HC
Operator
Ihc Health Services
Injuries
Minor
Aircraft Damage
Substantial
NTSB Number
WPR25LA006
The pilot of the helicopter reported that he mistakenly added more fuel than was required to complete a mountainous terrain, confined area landing at an elevation of 10,276 ft msl. During his approach to the landing area, the helicopter descended below the tree line preventing a go-around. As the helicopter descended, the pilot increased collective to add power, but he observed a high torque indication of 111% and he felt the “sluggish” performance of the helicopter. The tail rotor effectiveness diminished, an uncommanded right yaw ensued, and the helicopter landed hard, which resulted in substantial damage to the lower fuselage. The pilot reported that there were no preaccident mechanical failures or malfunctions with the powered glider that would have precluded normal operation.
NTSB Probable Cause
The pilot’s exceedance of the helicopter’s available power while landing in a confined area, which resulted in a loss of tail rotor effectiveness and a hard landing.
Full Narrative
The pilot of the helicopter reported that he mistakenly added more fuel than was required to complete a mountainous terrain, confined area landing at an elevation of 10,276 ft msl. During his approach to the landing area, the helicopter descended below the tree line preventing a go-around. As the helicopter descended, the pilot increased collective to add power, but he observed a high torque indication of 111% and he felt the “sluggish” performance of the helicopter. The tail rotor effectiveness diminished, an uncommanded right yaw ensued, and the helicopter landed hard, which resulted in substantial damage to the lower fuselage. The pilot reported that there were no preaccident mechanical failures or malfunctions with the powered glider that would have precluded normal operation.
Flight
Event TypeAccident
Event Time04:30 MDT
Nearest Airport0nm
Flight Plan FiledCvfr
Aircraft FireNo
Aircraft ExplosionNo
Aircraft
AircraftAgustawestland Spa AW109SP
Tail NumberN631HC
Aircraft CategoryHeli
DamageSubstantial
OperatorIhc Health Services
Operating RulePart 135
Engines2
Engine TypeTurboshaft
Engine DetailsPratt & Whitney · PW207C · Turboshaft · 700 | Pratt & Whitney · PW207C · Turboshaft · 700
Seats6
People & Injuries
Injury Summary1 injury (1 minor injury), 2 uninjured
Fatal0
Serious0
Minor1
Uninjured2
Total3
Crew 1Minor
Crew 2Age 59 · Second Class · None
Crew 3None
Conditions
ConditionsVMC
LightNight
Wind170° @ 5 kt
Visibility10 sm
CeilingNone
Temperature / Dew Point50 F / 27 F
Altimeter30.28 inHg
Observation Time04:53
Weather SourceWFAC