# NTSB CHI92FA218: Bull KR-2, N86QT, Oshkosh, WI, August 2, 1992

- Type: NTSB accident investigation
- Classification: Accident · Fatal · Field investigation · Final report
- Date: August 2, 1992, 11:33 local (16:33 UTC)
- Place: Oshkosh, WI
- Coordinates: 44.059539, -88.540725 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=44.0595&lon=-88.5407&mi=10
- Phase of flight: [Initial climb](https://openairdocs.org/ntsb-phases/350) (OpenAirDocs' grouping)
- Highest injury: Fatal
- Injuries: 1 fatal
- Status: Completed, report October 15, 1993
- Report: Approved by Office Director
- NTSB case key (mKey): 15301
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=CHI92FA218
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/15301/pdf
- Page: https://openairdocs.org/ntsb/CHI92FA218

## Probable cause

A LOSS OF CONTROL IN FLIGHT DUE TO PILOT INCAPACITATION AS A RESULT OF A HEART ATTACK.

## Sequence of events

In NTSB's coding before 2008 (https://www.ntsb.gov/GILS/Documents/codman.pdf).

- Loss of control - in flight, takeoff - initial climb
  - aircraft control - uncontrolled, pilot in command (cause)
  - incapacitation(cardiovascular), pilot in command (cause)
- In flight collision with terrain/water, takeoff - initial climb

## Analysis

THE PILOT WAS PARTICIPATING IN A FLY-BY DEMONSTRATION AT THE EAA CONVENTION. DURING INITIAL CLIMB, THE AIRPLANE WAS OBSERVED TO ENTER A STEEP BANK TO THE LEFT FOLLOWED BY A STEEP DESCENT INTO THE TERRAIN. NO MECHANICAL ANOMALIES WITH THE AIRPLANE WERE FOUND. POST-MORTEM EXAMINATION OF THE PILOT REVEALED ATHEROSCLEROTIC CHANGES IN THE HEART. THE LOCAL CORONER RULED THAT DEATH WAS DUE TO 'CARDIAC EVENT FOLLOWED BY CRASH.'

## Aircraft

- Registration: [N86QT](https://openairdocs.org/deregistered/N86QT-1993-01-14), registration cancelled 1993-01-14, S/N 4725JHB (OpenAirDocs)
- Reported make and model: BULL KR-2
- Registry model: [Bull Herbert S KR-2](https://openairdocs.org/model/bull-herbert-s-kr-2) (registry code 05648TY) (OpenAirDocs)
- Category: Airplane, amateur-built
- Serial number: 4725JHB
- Airframe hours: 243
- Engines: VOLKSWAGEN 2180CC 70 horsepower reciprocating
- Damage: Destroyed
- Flight: Personal, Part 91
- Operator: Bull, Herbert S.
- Airworthiness certificate: Special, Experimental (Special)
- Last inspection: Unknown, March 28, 1992, 7 hours before

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 71; private; airplane ratings: single-engine land; medical: class 2, valid medical--w/ waivers/lim; seat: left; toxicology performed; flight hours: 2,070 total, 243 in this make and model, 1,629 as pilot in command, 4 in the last 90 days, 3 in the last 30 days, 1 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: 300° at 8 knots
- Visibility: 12 statute miles
- Lowest ceiling: none
- Temperature: 73 °F, dew point 61 °F
- Altimeter: 29.00 inHg
- Observed at: OSH, 2 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 (OpenAirDocs).

- [Accident 19920802028459A](https://openairdocs.org/incident/19920802028459A), Aug 2, 1992: Amtr KR2, Oshkosh, WI, Destroyed, 1 fatal. Dived into city street after air show flyby. Pilot suffered heart attack and lost consciousness prior to impact.

From the NTSB's public API. Aircraft are matched to registry aircraft by N-number and event date, checked against the reported serial number, make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model.

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