MKC88LA092

NTSB accident investigation · Bell 47G-2 · Mc Dougal, AR · May 19, 1988

Accident · No injuriesLimited investigationFinal report
Date
May 19, 1988, 11:00 local (16:00 UTC)
Place
Mc Dougal, AR
Injuries
1 uninjured
Damage
Substantial damage
Phase of flight
Maneuvering
Aircraft
N4690Bell 47G-2
Weather
Visual (VMC) · Day
Status
Completed · report November 24, 1989
Report
Approved by Office Director
FAA report
19880519015849A
Case key
34570

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.

In flight collision with objectManeuvering - aerial application
Spray/dusting equipment - blocked(partial)Factor
Object - tree(s)Factor
Clearance - not maintainedPilot in commandCause
Diverted attentionPilot in commandCause
Loss of control - in flightManeuvering - aerial application
Misc rotorcraft,tail boom - sheared
In flight collision with terrain/waterDescent - uncontrolled
Terrain condition - rough/uneven

Analysis

The pilot stated that he had just begun the spraying of a rice field when one of the spray nozzles malfunctioned. As he was attempting to set the helicopter down on the ground, to work on the nozzle, the main rotor blades struck a tree. The main rotor blades then chopped off the tail boom, and the helicopter went out of control before impacting the terrain. No mechanical malfunction was discovered during the post-crash inspection.

Aircraft

Registration
N4690
Reported as
Bell 47G-2
Category
Helicopter
Serial number
BB2383
Airframe hours
3,188
Engine
Lycoming VO-435-A1B, 250 horsepower, reciprocating
Damage
Substantial damage
Flight
Aerial application · Part 137
Registered owner
Harmon Rex
Airworthiness certificate
Special, Restricted (Special)
Last inspection
Annual · July 31, 1987

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
45
Certificate
Commercial
Airplane ratings
Multi-engine land, Single-engine land
Medical
Class 2, Valid Medical--no waivers/lim.
Flight hours
2,400 total · 2,300 in this make and model · 2,250 as pilot in command · 40 in the last 30 days · 8 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
160° at 3 knots
Visibility
12 statute miles
Lowest ceiling
None
Temperature
81 °F, dew point 46 °F
Altimeter
29.00 inHg
Observed at
JBR, 38 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 N4690 · 2

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