MIA91LA096

NTSB accident investigation · Bartholomew Kolb Twinstar · Bronson, FL · March 12, 1991

Accident · FatalLimited investigationFinal report
Date
March 12, 1991, 17:50 local (22:50 UTC)
Place
Bronson, FL
Injuries
1 fatal
Damage
Destroyed
Phase of flight
Approach
Aircraft
N860RBBartholomew Kolb Twinstar
Weather
Visual (VMC) · Day
Status
Completed · report January 25, 1993
Report
Approved by Office Director
FAA report
19910312005249A
Case key
32830

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

Pilot-in-command's decision to initiate a flight with known deficiencies in his equipment in that his airspeed indicator was inoperative. He then failed to maintain airspeed in a turn on final approach, stalled, and crashed.

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
Flight/nav instruments,airspeed indicator - inoperativeFactor
Operation with known deficiencies in equipment - initiatedPilot in commandCause
Airspeed(vs) - not maintainedPilot in commandCause
Stall/mush - inadvertentPilot in commandCause
In flight collision with terrain/waterDescent - uncontrolled

Analysis

Witnesses stated that the pilot initiated the flight knowing that the airspeed indicator was inoperative. They observed the airplane on final approach when it entered a steep left 360-degree turn. They stated the left wing stalled and the airplane pitched nose down and crashed. Examination of the engine, airplane and flight controls revealed no preimpact failures.

Aircraft

Registration
N860RB
Reported as
Bartholomew Kolb Twinstar
Category
Airplane, amateur-built
Serial number
1
Engine
Rotax UNKNOWN, reciprocating
Damage
Destroyed
Flight
Personal · Part 91
Operator
Robert E. Bartholomew
Airworthiness certificate
Special, Experimental (Special)
Departed
X60 · Williston, FL

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
51
Certificate
Private
Airplane ratings
Single-engine land
Medical
Class 3, Expired
Toxicology
Performed
Flight hours
150 total

Weather

Conditions
Visual (VMC) · Day
Wind
270° at 9 knots
Visibility
7 statute miles
Lowest ceiling
10,000 ft broken
Temperature
66 °F, dew point 39 °F
Observed at
GNV, 12 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.