# NTSB CHI84LU003: Eipper Quicksilver MXL, Orfordville, WI, June 12, 1984

- Type: NTSB accident investigation
- Classification: Accident · Serious injuries · Final report
- Date: June 11, 1984, 19:21 local (Jun 12, 1984, 00:21 UTC)
- Place: Orfordville, WI
- Coordinates: 42.619434, -89.249145 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=42.6194&lon=-89.2491&mi=10
- Phase of flight: [Initial climb](https://openairdocs.org/ntsb-phases/350) (OpenAirDocs' grouping)
- Highest injury: Serious injuries
- Injuries: 1 serious, 1 minor
- Status: Completed
- Report: Approved by Office Director
- NTSB case key (mKey): 12792
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=CHI84LU003
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/12792/pdf
- Page: https://openairdocs.org/ntsb/CHI84LU003

## 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
  - control interference - inadvertent, passenger (cause)
  - remedial action - inadequate, pilot in command
- In flight collision with terrain/water, descent - uncontrolled

## Analysis

THE OPERATOR, FLYING OFF A LOCAL STREET, HAD JUST OFF-LOADED A PASSENGER WHEN ANOTHER INDIVIDUAL ASKED FOR A RIDE. THE OPERATOR AGREED AND WAS ON TAKEOFF CLIMB WHEN THE PASSENGER INTERFERRED WITH THE CONTROLS RESULTING IN AN UNCONTROLLED DESCENT AND GROUND IMPACT. THE TWO PLACE ULTRALIGHT HAD NOT BEEN GRANTED ANY EXEMPTIONS FOR LIMITED TRAINING FLIGHT.

## Aircraft

- Registration: UNREG (not matched to a registry record)
- Reported make and model: EIPPER QUICKSILVER MXL (QUICKSILVE)
- Category: Ultralight, amateur-built
- Engines: ROTAX 337 34 horsepower reciprocating
- Damage: Destroyed
- Flight: Personal, Part 103
- Operator: William A. Arneson
- Departed: ORDFORDVILLE, WI
- Airport: JVL, Jamesville

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 27; airplane ratings: single-engine land; medical: unknown, unknown; seat: left; flight hours: 100 in this make and model

## Weather

- Conditions: Visual (VMC), Day
- Wind: 130° at 10 knots
- Visibility: 20 statute miles
- Lowest ceiling: none
- Altimeter: 30.00 inHg
- Observed at: JVL, 3 nm away

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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