FTW88LA008

NTSB accident investigation · Bell 47G-2 · Lapra, TX · October 20, 1987

Accident · No injuriesLimited investigationFinal report
Date
October 20, 1987, 10:15 local (15:15 UTC)
Place
Lapra, TX
Injuries
3 uninjured
Damage
Substantial damage
Phase of flight
Maneuvering
Aircraft
N8403EBell 47G-2
Weather
Visual (VMC) · Day
Status
Completed · report June 16, 1989
Report
Approved by Office Director
FAA report
19871020082799A
Case key
22584

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/malfunctionManeuvering
Rotor drive system,clutch assembly - wornCause
Rotor drive system,clutch assembly - deterioratedCause
Forced landingDescent - emergency
Autorotation - performedPilot in command
In flight collision with objectLanding - flare/touchdown
Object - tree(s)Factor

Analysis

Upon entering a bank approx. 80 to 100 ft. off the ground, the aircraft experienced a power loss with vibration. During autorotation the aircraft contacted a tree causing substantial damage. Examination of the wreckage found the transmission clutch assembly shoes were worn and separated. The clutch drum was found to be extensively worn and scored.

Aircraft

Registration
N8403E
Reported as
Bell 47G-2
Category
Helicopter
Serial number
2257
Airframe hours
8,497
Engine
Lycoming V0-435-F, 200 horsepower, reciprocating
Damage
Substantial damage
Flight
Business · Part 91
Operator
Holt Helicopters Inc.
Registered owner
Holt Helicopters Inc.
Airworthiness certificate
Standard, Normal
Last inspection
100 hour · October 13, 1987
Departed
Uvalde, TX

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
30
Certificate
Commercial
Medical
Class 2, Valid Medical--no waivers/lim.
Seat
Right
Flight hours
380 total · 55 in this make and model · 265 as pilot in command · 80 in the last 90 days

Weather

Conditions
Visual (VMC) · Day
Wind
40° at 17 knots, gusting 20
Visibility
10 statute miles
Lowest ceiling
12,000 ft broken
Temperature
66 °F, dew point 55 °F
Altimeter
30.00 inHg

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 N8403E · 1

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