MIA87LA224

NTSB accident investigation · Bell 47J-2A · Orlando, FL · August 7, 1987

Accident · No injuriesLimited investigationFinal report
Date
August 7, 1987, 14:00 local (18:00 UTC)
Place
Orlando, FL
Injuries
3 uninjured
Damage
Substantial damage
Phase of flight
Approach
Aircraft
N8523FBell 47J-2A
Weather
Visual (VMC) · Day
Status
Completed · report October 7, 1988
Report
Approved by Office Director
FAA report
19870807047339A
Case key
31952

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

On this page

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.

Airframe/component/system failure/malfunctionApproach - vfr pattern - base leg/base to final
Rotor drive system,tail rotor drive shaft coupling - binding(mechanical)Cause
Rotor drive system,tail rotor drive shaft - failure,totalCause
Maintenance,lubrication - inadequateOther maintenance personnelCause
Aircraft preflight - inadequatePilot in commandFactor
Forced landingDescent - emergency
Autorotation - performedPilot in command
Hard landingLanding - roll
Flight controls - improper use ofPilot in commandFactor

Analysis

During the apch to land the tail rotor drive assy failed resulting in a momentary loss of control. The plt then autorotated & landed on the company helipad, during which the helicopter sustained substantial damage. Examination of the tail rotor drive assy revealed that the fwd short shaft failed torsionally aprx 2 inches aft of the transmission drive coupling due to a lack of lubrication in it. The failure occurred at aprx 40' AGL.

Aircraft

Registration
N8523F
Reported as
Bell 47J-2A
Category
Helicopter
Serial number
3317
Airframe hours
6,965
Engine
Lycoming VO-540-BIB3, 260 horsepower, reciprocating
Damage
Substantial damage
Flight
Part 91
Registered owner
Dolphin Helicopter Inc.
Airworthiness certificate
Standard, Normal
Last inspection
100 hour · July 18, 1987 · 44 hours before
Flight plan
Company VFR

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
26
Certificate
Commercial
Instrument ratings
Helicopter
Medical
Class 2, Valid Medical--no waivers/lim.
Seat
Left
Flight hours
3,000 total · 950 in this make and model · 100 in the last 90 days · 5 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
270° at 5 knots
Visibility
7 statute miles
Lowest ceiling
None
Temperature
93 °F, dew point 75 °F
Altimeter
30.00 inHg
Observed at
MCO, 5 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.

Other investigations on N8523F · 2

Matched to the same aircraft by N-number and date.