# NTSB CHI93LA211: Monnett Sonerai IIL, N247RJ, De Kalb, IL, June 6, 1993

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: June 6, 1993, 11:45 local (16:45 UTC)
- Place: De Kalb, IL
- Coordinates: 41.889766, -88.750244 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=41.8898&lon=-88.7502&mi=10
- Phase of flight: [Takeoff](https://openairdocs.org/ntsb-phases/300) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed, report October 13, 1993
- Report: Approved by Office Director
- NTSB case key (mKey): 15737
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=CHI93LA211
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/15737/pdf
- Page: https://openairdocs.org/ntsb/CHI93LA211

## Probable cause

THE PILOT IN COMMAND'S INABILITY TO MAINTAIN DIRECTIONAL CONTROL DUE TO INADEQUATE COMPENSATION FOR WIND CONDITIONS.

## Sequence of events

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

- Loss of control - on ground/water, takeoff - roll/run
  - flight control,aileron attachment - disconnected
  - compensation for wind conditions - inadequate, pilot in command (cause)
  - weather condition - crosswind (cause)
- In flight collision with object, takeoff - initial climb

## Analysis

THE PILOT STATED THAT DURING TAKEOFF IN A 12 KT, 80 DEGREE LEFT CROSSWIND, THE AIRCRAFT BEGAN DRIFTING TO THE RIGHT. THE PILOT STATED THAT EVEN AFTER APPLYING STICK AND RUDDER CONTROL THE AIRCRAFT CONTINUED TO THE RIGHT. THE RIGHT WING STRUCK A RUNWAY LIGHT/SIGN JUST AS THE AIRPLANE BEGAN TO GET AIRBORNE. AFTER THE PILOT STOPPED THE AIRCRAFT ON GRASS TO THE RIGHT SIDE OF THE RUNWAY, THE LEFT AILERON WAS FOUND TO BE DISCONNECTED FROM ITS ACTUATING ARM.

## Aircraft

- Registration: [N247RJ](https://openairdocs.org/deregistered/N247RJ-2001-04-09), registration cancelled 2001-04-09, S/N 999 (OpenAirDocs)
- Reported make and model: MONNETT SONERAI IIL (SONERAI II)
- Registry model: [Jaeger Robert G SONERAI II L](https://openairdocs.org/model/jaeger-robert-g-sonerai-ii-l) (registry code 056592T) (OpenAirDocs)
- Category: Airplane, amateur-built
- Serial number: 999
- Airframe hours: 165
- Engines: Monnett VW 2020 CC. 60 horsepower reciprocating
- Damage: Substantial damage
- Flight: Personal, Part 91
- Operator: Robert G. Jaeger
- Registered owner: Robert G. Jaeger
- Airworthiness certificate: Special, Experimental (Special)
- Last inspection: Annual, April 2, 1993, 6 hours before
- Destination: DPA, WEST CHICAGO, IL
- Airport: DKB, Dekalb Taylor Municipal, runway 27, 4,200 × 50 ft, asphalt

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 46; private; airplane ratings: single-engine land; medical: class 3, valid medical--w/ waivers/lim; seat: rear; flight hours: 400 total, 160 in this make and model, 340 as pilot in command, 9 in the last 90 days, 2 in the last 30 days

## Weather

- Conditions: Visual (VMC), Day
- Wind: 180° at 12 knots
- Visibility: 15 statute miles
- Lowest ceiling: none
- Temperature: 75 °F

## 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 19930606022899A](https://openairdocs.org/incident/19930606022899A), Jun 6, 1993: Amtrmo SONERAI2, Dekalb, IL, Substantial damage. Lost directional control on takeoff. Wing struck runway light. Aborted. Found left aileron disconnected.

## Other investigations on N247RJ (1)

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.

- [NTSB CHI98LA128](https://openairdocs.org/ntsb/CHI98LA128), Apr 17, 1998: Jaeger Sonerai II-L (N247RJ), Bicknell, IN, destroyed. Probable cause: The pilot misjudged his altitude and airspeed during an emergency landing attempt. Factors associated with this accident were a manufacturing defect in the magneto drive coupling and a total failure…

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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