# NTSB CHI90DEE03: Nelsen-David Sonerai II/EV, N4984H, Huntley, IL, November 26, 1989

- Type: NTSB accident investigation
- Classification: Accident · Fatal · Final report
- Date: November 26, 1989, 10:40 local (16:40 UTC)
- Place: Huntley, IL
- Location: 42.1608° N, 88.4355° W: Placed by OpenAirDocs: center of Huntley, IL, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=42.1608&lon=-88.4355&mi=10
- Phase of flight: [Maneuvering](https://openairdocs.org/ntsb-phases/450) (OpenAirDocs' grouping)
- Highest injury: Fatal
- Injuries: 1 fatal
- Status: Completed, report September 30, 1991
- Report: Approved by Office Director
- NTSB case key (mKey): 14449
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=CHI90DEE03
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/14449/pdf
- Page: https://openairdocs.org/ntsb/CHI90DEE03

## Probable cause

PILOT-IN-COMMAND'S FAILURE TO MAINTAIN AIRSPEED DURING A TURN AT LOW ALTITUDE, RESULTING IN AN INADVERTENT STALL AND IMPACT WITH TERRAIN, LACK OF RECENT TOTAL EXPERIENCE AND LACK OF TOTAL EXPERIENCE IN TYPE OF AIRCRAFT.

## Sequence of events

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

- Loss of control - in flight, maneuvering
  - airspeed - not maintained, pilot in command (cause)
  - lack of recent total experience, pilot in command (cause)
  - stall/spin - inadvertent, pilot in command (cause)
  - lack of total experience in type of aircraft, pilot in command (cause)
- In flight collision with terrain/water, descent - uncontrolled

## Aircraft

- Registration: [N4984H](https://openairdocs.org/deregistered/N4984H-1990-10-23), registration cancelled 1990-10-23, S/N 507 (OpenAirDocs)
- Reported make and model: NELSEN-DAVID SONERAI II/EV (SONERAI II)
- Registry model: [Nelsen-David SONERAI II EV](https://openairdocs.org/model/nelsen-david-sonerai-ii-ev) (registry code 05659E6) (OpenAirDocs)
- Category: Airplane, amateur-built
- Serial number: 507
- Airframe hours: 61
- Engines: Monnett EV2/1850 65 horsepower reciprocating
- Damage: Destroyed
- Flight: Personal, Part 91
- Registered owner: Thomas M. Aloy
- Airworthiness certificate: Special, Experimental (Special)
- Last inspection: Annual, October 1, 1989, 2 hours before
- Airport: 61L6, Reid Rla, runway 36, 3,000 × 50 ft, grass/turf

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 35; private; airplane ratings: single-engine land; medical: class 3, valid medical--no waivers/lim.; seat: rear; toxicology performed; flight hours: 92 total, 1 in this make and model, 48 as pilot in command, 3 in the last 90 days

## Weather

- Conditions: Visual (VMC), Day
- Wind: 180° at 5 knots
- Visibility: 15 statute miles
- Lowest ceiling: none
- Temperature: 45 °F, dew point 28 °F
- Altimeter: 29.00 inHg
- Observed at: RFD, 31 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 19891126047209A](https://openairdocs.org/incident/19891126047209A), Nov 26, 1989: Amtrmo SONERAI2, Gilbert, IL, Destroyed, 1 fatal. Caught a wing on the ground turning a low final. Aircraft cartwheeled and broke up.

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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