# NTSB CHI84FA396: Robert Eggebrecht Sonerai 2L, N199B, Plato Center, IL, September 22, 1984

- Type: NTSB accident investigation
- Classification: Accident · Fatal · Field investigation · Final report
- Date: September 22, 1984, 15:20 local (20:20 UTC)
- Place: Plato Center, IL
- Location: 42.0037° N, 88.4761° W: Placed by OpenAirDocs from NTSB’s distance and direction from Olson Airport (LL53), closed, within about a mile (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=42.0037&lon=-88.4761&mi=10
- Phase of flight: [Initial climb](https://openairdocs.org/ntsb-phases/350) (OpenAirDocs' grouping)
- Highest injury: Fatal
- Injuries: 1 fatal
- Status: Completed
- Report: Approved by Office Director
- NTSB case key (mKey): 12429
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=CHI84FA396
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/12429/pdf
- Page: https://openairdocs.org/ntsb/CHI84FA396

## 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
  - performance data - not understood, pilot in command (cause)
  - improper initial training, pilot in command (cause)
  - lift-off - premature, pilot in command (cause)
  - pull-up - excessive, pilot in command (cause)
  - proper climb rate - not attained, pilot in command (cause)
  - stall/spin - not corrected, pilot in command (cause)
- In flight collision with terrain/water, descent - uncontrolled

## Analysis

THE ACFT STALLED & SPUN TO THE GROUND FROM ABOUT 200 FT AGL AFTER AN ABRUPT PULL-UP TO APRX 45 DEGREE DECK ANGLE DURING A PREMATURE LIFTOFF. THE PLT HAD BEEN OBSERVED MAKING HIGH SPEED TAXI RUNS 'TO GET THE FEEL OF THE ACFT'. AFTER A RUN RESULTED IN A LIFTOFF, THE RT WING DROPPED & ALMOST HIT THE RWY. THE PLT WAS OBSERVED RAISING THE WING BY APPLICATION OFTHE FLT CONTROLS BUT NO LOWERING OF THE NOSE OCCURRED. THE ACFT CONTINUED THE STEEPER THAN NORMAL CLIMB AND REACHED AN ALT OF APRX 150 FT AGL BEFORE THE RT WING DROPPED TWO MORE TIMES. ONE RECOVERY OF BANK WAS ACCOMPLISHED WITH THE NOSE OFTHE ACFT STILL MAINTAINED IN A CLIMB ATTITUDE. THE WING DROPPED SHARPLY THE 3RD TIME AND THE ACFT WENT INTO A SPIN FROM WHICH NO RECOVERY WAS MADE. THE WITNESSES SAID THAT THE ACFT NEVER APPEARED TO REACH THE PROPER FLYING SPEED. THE ACFT OWNER HAD JUST FLOWN IN THIS ACFT WITH NO MECHANICAL DIFFICULTIES AS STATED IN HIS REPORT. THE PLT HAD LOGGED NO FLT TIME SINCE 1/4/84. NO MEDICAL OR MECHANICAL DISCREPANCIES WERE FOUND DURING THE INVESTIGATION.

## Aircraft

- Registration: [N199B](https://openairdocs.org/deregistered/N199B-1990-03-27), registration cancelled 1990-03-27, S/N 1022L (OpenAirDocs)
- Reported make and model: ROBERT EGGEBRECHT SONERAI 2L
- Registry model: [Eggebrecht Robert SONERAI 2L](https://openairdocs.org/model/eggebrecht-robert-sonerai-2l) (registry code 05659U7) (OpenAirDocs)
- Category: Airplane, amateur-built
- Serial number: 1022L
- Airframe hours: 89
- Engines: VOLKSWAGEN 2374 65 horsepower reciprocating
- Damage: Destroyed
- Flight: Personal, Part 91
- Registered owner: Edward H. Paxton
- Airworthiness certificate: Special, Experimental (Special)
- Last inspection: AAIP, September 14, 1983, 68 hours before
- Airport: LL53, Olson, runway 23, 2,000 × 100 ft, asphalt

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 37; commercial, airline transport, private; airplane ratings: multi-engine land, single-engine land; instrument ratings: airplane; medical: class 3, valid medical--no waivers/lim.; seat: front; toxicology performed; flight hours: 2,613 total, 2,522 as pilot in command, 20 in the last 90 days, 10 in the last 30 days

## Weather

- Conditions: Visual (VMC), Day
- Wind: 160° at 6 knots
- Visibility: 6 statute miles
- Lowest ceiling: 2,000 ft overcast
- Temperature: 70 °F, dew point 57 °F
- Altimeter: 30.00 inHg
- Observed at: DPA, 11 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 19840922050319A](https://openairdocs.org/incident/19840922050319A), Sep 22, 1984: Amtrmo SONERAI2, Plato Center, IL, Destroyed. First flight in homebuilt. Failed to attain flying speed on nose high climbout. Fell off into a spin to the ground.

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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