MKC86FA166

NTSB accident investigation · Attebery-Stainbrook Varieze · Osawatomie, KS · August 3, 1986

Accident · FatalField investigationFinal report
Date
August 3, 1986, 08:20 local (13:20 UTC)
Place
Osawatomie, KS
Injuries
1 fatal
Damage
Destroyed
Phase of flight
Enroute
Aircraft
N6BZAttebery-Stainbrook Varieze
Weather
Visual (VMC) · Day
Status
Completed
Report
Approved by Office Director
FAA report
19860803036809A
Case key
34074

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/malfunctionCruise
Acft/equip,inadequate aircraft manualsProduction/design personnelFactor
Wing - separation
Acft/equip,inadequate compliance determinationFaa inspectorFactor
Loss of control - in flightCruise
Emergency procedure - attemptedPilot in command
Remedial action - not possiblePilot in commandFactor
Directional control - not possiblePilot in command

Analysis

Witnesses stated that the aircraft appeared to be operating normally and flying at cruise altitude when, suddenly the left (port) wing separated from the fuselage. Sounds of engine power ceased immediately following the in-flight breakup and the aircraft plummeted to the ground under no apparent control, the witnesses further stated. The main wreckage was located on a cornfield resting in an inverted position. The left main wing was located on an open field one quarter mile away. On-scene inspection of the wreckage revealed that neither wing had been secured to the main fuselage with any kind of fastening device. Epoxy and paint about the wing root area were found to be the only means of keeping the wings and the fuselage mated. No engine malfunction was discovered. This aircraft had logged just over 14 flight hours prior to the accident flight.

Aircraft

Registration
N6BZ
Reported as
Attebery-Stainbrook Varieze
Category
Airplane, amateur-built
Serial number
1200
Airframe hours
15
Engine
Continental O-200A, 100 horsepower, reciprocating
Damage
Destroyed
Flight
Personal · Part 91
Registered owner
Benjamin A. Attebery
Airworthiness certificate
Special, Experimental (Special)
Last inspection
Annual · June 26, 1986
Departed
K81 · Osawatomie, KS

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
49
Certificate
Private
Airplane ratings
Single-engine land
Medical
Class 3, Valid Medical--w/ waivers/lim
Seat
Front
Toxicology
Performed
Flight hours
1,506 total · 15 in this make and model · 1,400 as pilot in command

Weather

Conditions
Visual (VMC) · Day
Wind
360° at 5 knots
Visibility
15 statute miles
Temperature
79 °F, dew point 64 °F
Altimeter
30.00 inHg
Observed at
MKC, 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.