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NTSB Report
August 27, 2023 · Hiller UH-12A · N8178H
Mosby, MO
Overview
Report Status
Probable Cause
Event Type
Accident
Date
August 27, 2023
Injury Outcomes
No injuries (1 uninjured)
Location
Mosby, MO
Aircraft
Hiller UH-12A (1950)
Tail Number
N8178H
Operator
Pleasure
Injuries
None
Aircraft Damage
Substantial
NTSB Number
CEN23LA383
The pilot reported that during a hover taxi, he inadvertently allowed the engine rpm to decrease. He increased the throttle, but the helicopter landed hard on its skids in the grass and the tail rotor impacted the ground. The ground strike resulted in substantial damage to the tail rotor blades and tailboom assembly. The pilot reported that there were no preaccident mechanical failures or malfunctions with the helicopter that would have precluded normal operation. The pilot noted that a better scan of the engine instruments could have prevented the accident.
NTSB Probable Cause
Aircraft-Aircraft oper/perf/capability-Performance/control parameters-Powerplant parameters-Not attained/maintained
Full Narrative
The pilot reported that during a hover taxi, he inadvertently allowed the engine rpm to decrease. He increased the throttle, but the helicopter landed hard on its skids in the grass and the tail rotor impacted the ground. The ground strike resulted in substantial damage to the tail rotor blades and tailboom assembly. The pilot reported that there were no preaccident mechanical failures or malfunctions with the helicopter that would have precluded normal operation. The pilot noted that a better scan of the engine instruments could have prevented the accident.
Flight
Event TypeAccident
Event Time18:00 CDT
Nearest AirportMidwest National Air Center Ai (0nm N)
Runway18/3
Runway Length5502 ft
Runway Width100 ft
Flight Plan FiledNone
Flight Plan ActivatedNo
Aircraft FireNo
Aircraft ExplosionNo
Aircraft
AircraftHiller UH-12A
Tail NumberN8178H
Aircraft CategoryHeli
DamageSubstantial
OperatorPleasure
Operating RulePart 91
Engines1
Engine TypeReciprocating
Engine DetailsFranklin · 6V-335 SERIES · Reciprocating · 200
Seats3
People & Injuries
Injury SummaryNo injuries (1 uninjured)
Fatal0
Serious0
Minor0
Uninjured1
Total1
Crew 1Age 69 · Basc · None
Conditions
ConditionsVMC
LightDaylight
Wind360° @ 4 kt
Visibility10 sm
CeilingBroken clouds 2100 ft
Temperature / Dew Point55 F
Altimeter30.01 inHg
Observation Time18:15
Weather SourceWFAC