# NTSB CHI92DEP01: Lassiter Swearingen SX300, N9SX, Eagle River, WI, October 18, 1991

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Final report
- Date: October 18, 1991, 17:00 local (22:00 UTC)
- Place: Eagle River, WI
- Coordinates: 45.919818, -89.250648 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=45.9198&lon=-89.2506&mi=10
- Phase of flight: [Takeoff](https://openairdocs.org/ntsb-phases/300) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed, report February 8, 1993
- Report: Approved by Office Director
- NTSB case key (mKey): 15242
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=CHI92DEP01
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/15242/pdf
- Page: https://openairdocs.org/ntsb/CHI92DEP01

## Probable cause

THE PARTIAL LOSS OF ENGINE POWER, FOR REASONS UNDETERMINED WHICH RESULTED IN AN ABORTED TAKEOFF AND EVENTUAL OVERRUN AND LANDING GEAR COLLAPSE.

## Sequence of events

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

- Airframe/component/system failure/malfunction, takeoff
  - engine assembly - undetermined (cause)
  - abort - initiated, pilot in command
- Overrun, takeoff - aborted
  - all available runway - exceeded, pilot in command
- Gear collapsed, takeoff - aborted

## Analysis

THE PILOT OF THE AMATEUR BUILT AIRPLANE INDICATED THAT ON TAKEOFF ROLL THE ENGINE MISFIRED AND HE ABORTED THE TAKEOFF.  THE PILOT WAS UNABLE TO STOP THE AIRPLANE ON THE REMAINING RUNWAY AND THE AIRPLANE OVERRAN THE END OF THE TAKEOFF RUNWAY.  THE LANDING GEAR COLLAPSED DURING THE OVERRUN.  A SUBSEQUENT EXAMINATION FAILED TO REVEAL THE NATURE OF THE PARTIAL POWER LOSS.

## Aircraft

- Registration: [N9SX](https://openairdocs.org/aircraft/N9SX), registered now, S/N 68 (OpenAirDocs)
- Reported make and model: LASSITER SWEARINGEN SX300 (SWEARINGEN)
- Registry model: [Lassiter James Walter SX300 SWEARINGEN](https://openairdocs.org/model/lassiter-james-walter-sx300-swearingen) (registry code 0568002) (OpenAirDocs)
- Category: Airplane, amateur-built
- Serial number: 68
- Airframe hours: 70
- Engines: LYCOMING IO-540 300 horsepower reciprocating
- Damage: Substantial damage
- Flight: Personal, Part 91
- Operator: Kendall, Robert J.
- Registered owner: Kendall, Robert J.
- Airworthiness certificate: Special, Experimental (Special)
- Last inspection: Unknown, January 2, 2000, 70 hours before
- Airport: EGV, Eagle River Union, runway 22, 5,000 × 75 ft, asphalt

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 36; private; airplane ratings: single-engine land; medical: class 3, valid medical--no waivers/lim.; flight hours: 415 total, 36 in this make and model, 283 as pilot in command, 27 in the last 90 days, 4 in the last 30 days, 1 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: 270° at 5 knots
- Visibility: 15 statute miles
- Lowest ceiling: 10,000 ft broken
- Temperature: 37 °F, dew point 19 °F
- Altimeter: 30.00 inHg
- Observed at: RHI, 20 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 19911018047259A](https://openairdocs.org/incident/19911018047259A), Oct 18, 1991: Amtres SX300, Eagle River, WI, Substantial damage. Engine sputtered on takeoff roll. Elected to abort. Ran off end runway. No defects found.

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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