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NTSB Report
April 14, 1986 · Bell UH-1B · N4242T
North Port, FL
Overview
Report Status
Preliminary report
Event Type
Accident
Date
April 14, 1986
Injury Outcomes
No injuries (2 uninjured)
Location
North Port, FL
Aircraft
Bell UH-1B
Tail Number
N4242T
Operator
Colony Helicopters
Injuries
None
Aircraft Damage
Substantial
NTSB Number
MIA86LA138
THE FLT EXPERIENCED AN ENG FAILURE AT AN ALT OF APRX 8 FT AGL SHORTLY AFTER TAKEOFF AND THE HELICOPTER SUSTAINED SUBSTANTIAL DAMAGE WHEN A HARD LANDING WAS MADE. POST ACCIDENT INSPECTION OF THE ENG REVEALED THE PWR TURBINE WHEEL EXPERIENCED A LOSS OF TWO TURBINE BLADES WHICH IN TURN CAUSED THE TURBINE SECTION OF THE ENG TO SEIZE, SHEARING THE DRIVE SHAFT TO THE COMPRESSOR SECTION OF THE ENG. THE FAILURE POINT OF THE TWO TURBINE BLADES REVEALED BURNING WHICH IS EVIDENT OF PRE-EXISTING CRACKS.
Full Narrative
THE FLT EXPERIENCED AN ENG FAILURE AT AN ALT OF APRX 8 FT AGL SHORTLY AFTER TAKEOFF AND THE HELICOPTER SUSTAINED SUBSTANTIAL DAMAGE WHEN A HARD LANDING WAS MADE. POST ACCIDENT INSPECTION OF THE ENG REVEALED THE PWR TURBINE WHEEL EXPERIENCED A LOSS OF TWO TURBINE BLADES WHICH IN TURN CAUSED THE TURBINE SECTION OF THE ENG TO SEIZE, SHEARING THE DRIVE SHAFT TO THE COMPRESSOR SECTION OF THE ENG. THE FAILURE POINT OF THE TWO TURBINE BLADES REVEALED BURNING WHICH IS EVIDENT OF PRE-EXISTING CRACKS.
Flight
Event TypeAccident
Event Time08:15 EST
Nearest Airport0nm N
Runway0
Flight Plan FiledNone
Aircraft FireNo
Aircraft ExplosionNo
Aircraft
AircraftBell UH-1B
Tail NumberN4242T
Aircraft CategoryHeli
DamageSubstantial
OperatorColony Helicopters
Operating RulePart 91
Engines1
Engine TypeTurboshaft
Engine DetailsLycoming · T-53-L-1A · Turboshaft · 860
Seats9
People & Injuries
Injury SummaryNo injuries (2 uninjured)
Fatal0
Serious0
Minor0
Uninjured2
Total2
Crew 1Age 41 · Second Class
Conditions
ConditionsVMC
LightDaylight
Wind50° @ 10 kt
Visibility10 sm
CeilingNone
Temperature / Dew Point64 F / 61 F
Altimeter29.00 inHg
Observation Time12:46
Weather SourceWFAC