MIA93LA128

NTSB accident investigation · John Shufflebarger Zenair Zodiak · Lakeland, FL · May 22, 1993

Accident · No injuriesLimited investigationFinal report
Date
May 22, 1993, 10:12 local (14:12 UTC)
Place
Lakeland, FL
Injuries
1 uninjured
Damage
Substantial damage
Phase of flight
Approach
Aircraft
N693JSJohn Shufflebarger Zenair Zodiak
Weather
Visual (VMC) · Day
Status
Completed · report December 3, 1993
Report
Approved by Office Director
FAA report
19930522014679A
Case key
33273

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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Probable cause

The failure of the pilot-in-command to maintain airspeed after separation of the canopy, resulting in the aircraft entering a stall/mush condition and descending uncontrolled to the ground. Contributing to the accident was the failure of the pilot-in-command to fully lock the canopy before flight.

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 control - in flightApproach - vfr pattern - final approach
Window,canopy - not securedFactor
Preflight planning/preparation - improperPilot in commandFactor
Window,canopy - separationFactor
Airspeed(vs) - not maintainedPilot in commandCause
Diverted attentionPilot in commandCause
Stall/mush - inadvertentPilot in commandCause
In flight collision with terrain/waterDescent - uncontrolled
Terrain condition - roadway/highway

Analysis

The pilot stated that while at 150 feet on short final approach the canopy came open on the left side and opened to the right. The canopy then separated. The airspeed inadvertently got low and the aircraft descended. The aircraft then touched down hard at a point 1000 feet short of the runway. The manufacturer of the aircraft kit stated he had flown the aircraft on the previous flight and had no problems with the canopy. He stated the canopy design has had no previous problems or cases of it coming open in flight. He stated the pilot must not have had the canopy fully locked for the flight.

Aircraft

Registration
N693JS
Reported as
John Shufflebarger Zenair Zodiak (ZENAIR ZOD)
Category
Airplane, amateur-built
Serial number
3006
Airframe hours
1
Engine
Rotax 912, 80 horsepower, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Operator
Shufflebarger, John B.
Registered owner
Shufflebarger, John B.
Airworthiness certificate
Special, Experimental (Special)
Last inspection
Annual · April 24, 1993 · 1 hours before
Departed
LAL

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
Private
Airplane ratings
Single-engine land
Medical
Class 3, Valid Medical--w/ waivers/lim
Seat
Left
Flight hours
180 total · 1 in this make and model · 118 as pilot in command · 7 in the last 90 days · 2 in the last 30 days · 1 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
20° at 9 knots
Visibility
12 statute miles
Lowest ceiling
None
Temperature
72 °F, dew point 46 °F
Altimeter
30.00 inHg
Observed at
LAL, 1 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.