CHI91DEP08

NTSB accident investigation · Jack Thomas Pitts S-IT · Kenosha, WI · June 16, 1991

Accident · FatalFinal report
Date
June 16, 1991, 17:08 local (23:08 UTC)
Place
Kenosha, WI
Injuries
1 fatal
Damage
Destroyed
Phase of flight
Maneuvering
Aircraft
N83AMJack Thomas Pitts S-IT
Weather
Visual (VMC) · Day
Status
Completed · report March 24, 1993
Report
Approved by Office Director
FAA report
19910616021879A
Case key
14841

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

Improper maintenance, by person or persons unknown, to the elevator control system which allowed a bolt attaching the elevator control rod to the pitch bellcrank to become disconnected during 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.

Airframe/component/system failure/malfunctionManeuvering
Flt control syst,elevator control cable/rod - disconnectedFactor
Maintenance,installation - improperUnknownCause
In flight collision with terrain/waterDescent - uncontrolled
Aircraft control - not possiblePilot in command

Analysis

The amateur built aircraft was conducting aerobatic maneuvers when it descended into the terrain. A post accident examination of the airframe revealed that the pitch (elevator) control linkage under the pilot's seat, at the bellcrank, was missing a bolt. There was no evidence of an inflight failure in this area and both the torque tube and rod end showed no indication of damage. The bolt was not located.

Aircraft

Registration
N83AM
Reported as
Jack Thomas Pitts S-IT
Category
Airplane, amateur-built
Serial number
T-020TJ
Engine
Lycoming AEI0-360-A1E, 200 horsepower, reciprocating
Damage
Destroyed
Flight
Personal · Part 91
Operator
David Cargill
Registered owner
D M Car Co Inc
Airworthiness certificate
Special, Experimental (Special)
Last inspection
Annual · July 9, 1990 · 40 hours before

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
38
Certificates
Commercial, Private
Airplane ratings
Single-engine land, Multi-engine land
Medical
Class 2, Valid Medical--no waivers/lim.
Seat
Front
Toxicology
Performed

Weather

Conditions
Visual (VMC) · Day
Wind
Calm
Visibility
7 statute miles
Temperature
-0 °F, dew point -0 °F

FAA reports on this event · 1

The FAA’s own accident and incident reports, matched to the aircraft by N-number and date.