MIA86LA138

NTSB accident investigation · Bell UH-1B · North Port, FL · April 14, 1986

Accident · No injuriesLimited investigationFinal report
Date
April 14, 1986, 08:15 local (13:15 UTC)
Place
North Port, FL
Injuries
2 uninjured
Damage
Substantial damage
Phase of flight
Initial climb
Aircraft
N4242TBell UH-1B
Weather
Visual (VMC) · Day
Status
Completed
Report
Approved by Office Director
FAA report
19860414015329A
Case key
31616

From the NTSB’s public API. By law, NTSB reports can’t be used as evidence in lawsuits over the accident.

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Sequence of events

NTSB’s coding before 2008: each occurrence and phase of flight, and the causes and factors under it. The codes are defined in NTSB’s coding manual.

Loss of engine power(total) - mech failure/malfTakeoff - initial climb
Turbine assembly,turbine blade - fatigueCause
Turbine assembly,turbine blade - failure,totalCause
Hard landingLanding - flare/touchdown

Analysis

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.

Aircraft

Registration
N4242T
Reported as
Bell UH-1B
Category
Helicopter
Serial number
62-1906
Airframe hours
8,504
Engine
Lycoming T-53-L-1A, 860 horsepower, turbo shaft
Damage
Substantial damage
Flight
Business · Part 91
Operator
Colony Helicopters
Airworthiness certificate
Special, Restricted (Special)
Last inspection
Annual · November 1, 1985 · 7 hours before

Matched to the registry by N-number and the event date; the registry’s history has gaps, so older matches can be wrong. Compare the reported make and model.

Flight crew

As NTSB recorded them. NTSB leaves out names.

Role
Pilot
Age
41
Certificate
Commercial
Medical
Class 2, Valid Medical--no waivers/lim.
Seat
Left
Flight hours
11,988 total · 1,941 in this make and model · 11,709 as pilot in command · 69 in the last 90 days · 2 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
50° at 10 knots
Visibility
10 statute miles
Lowest ceiling
None
Temperature
64 °F, dew point 61 °F
Altimeter
29.00 inHg
Observed at
RSW, 45 nm away

FAA reports on this event · 1

The FAA’s own accident and incident reports, matched to the aircraft by N-number and date.