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Aviation safety reports, made easier to study

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July 11, 2023 · Bell UH-1H · N900VF

Woodlawn, IL

Overview

Report Status
Final with probable cause
Event Type
Accident
Date
July 11, 2023
Injury Outcomes
No injuries (1 uninjured)
Location
Woodlawn, IL
Aircraft
Bell UH-1H (1968)
Tail Number
N900VF
Operator
Kash Helicopter Services
Injuries
None
Aircraft Damage
Substantial
NTSB Number
CEN23LA295

The pilot reported that the helicopter exhibited a “sudden bounce/shake that became extremely violent.” He immediately began a descent for landing in a corn field. About 50 feet above ground level, the helicopter began an uncommanded 180° turn and landed upright in the field. The tail boom separated and was located in the corn field near the fuselage. The fuselage and main rotor blades were damaged, and the main rotor transmission was dislocated from the mounts, consistent with the forced landing. The operator reported that there was no mechanical malfunction or failure associated with the helicopter, and that the engine was still running after impact. However, because the operator did not make the helicopter available for a postaccident examination, the reason for the violent bouncing/shaking and subsequent tail boom separation could not be determined.

NTSB Probable Cause

The separation of the tail boom from the fuselage for reasons that could not be determined.

Full Narrative

On July 11, 2023, at 0840 central daylight time, a Bell UH-1H helicopter, N900VF, was substantially damaged when it was involved in an accident near Woodlawn, Illinois. The pilot was not injured. The helicopter was operated as a Title 14 Code of Federal Regulations Part 137 agricultural application flight. The pilot reported that the helicopter exhibited a “sudden bounce/shake that became extremely violent.” He immediately began a descent for landing in a corn field. About 50 feet above ground level, the helicopter began an uncommanded 180° turn and landed upright in the field. The tail boom separated and was located in the corn field near the fuselage. The fuselage and main rotor blades were damaged, and the main rotor transmission was dislocated from the mounts, consistent with the forced landing. The operator reported that there was no mechanical malfunction or failure associated with the helicopter, and that the engine was still running after impact. The operator did not make the helicopter available for a postaccident examination.

Flight

Event TypeAccident
Event Time08:40 CDT
Nearest AirportN/A (0nm)
Flight Plan FiledNone
Flight Plan ActivatedNo
Aircraft FireNo
Aircraft ExplosionNo

Aircraft

AircraftBell UH-1H
Tail NumberN900VF
Aircraft CategoryHeli
DamageSubstantial
OperatorKash Helicopter Services
Operating RulePart 137
Engines1
Engine TypeTurboshaft
Engine DetailsHoneywell · T53-L-703 · Turboshaft · 1800
Seats3

People & Injuries

Injury SummaryNo injuries (1 uninjured)
Fatal0
Serious0
Minor0
Uninjured1
Total1
Crew 1Age 60 · Second Class · None

Conditions

ConditionsVMC
LightDaylight
Wind220° @ 9 kt
Visibility10 sm
CeilingNone
Temperature / Dew Point64 F
Altimeter30.01 inHg
Observation Time08:56
Weather SourceWFAC

Appendix: Source Data