# NTSB CHI96LA268: Ultravia Aero Int'l Pelican, Winneconne, WI, August 1, 1996

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: August 1, 1996, 18:30 local (23:30 UTC)
- Place: Winneconne, WI
- Coordinates: 44.10984, -88.709632 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=44.1098&lon=-88.7096&mi=10
- Phase of flight: [Takeoff](https://openairdocs.org/ntsb-phases/300) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 2 uninjured
- Status: Completed, report December 23, 1996
- Report: Approved by Office Director
- NTSB case key (mKey): 10336
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=CHI96LA268
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/10336/pdf
- Page: https://openairdocs.org/ntsb/CHI96LA268

## Probable cause

failure of the pilot to maintain directional control of the airplane during the takeoff roll, which resulted in a ground swerve.  The location of the tree was a related factor.

## 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
  - directional control - not maintained, pilot in command (cause)
  - ground loop/swerve - inadvertent, pilot in command (cause)
- On ground/water collision with object, takeoff - roll/run
  - object - tree(s) (contributing factor)

## Analysis

As the pilot was attempting to takeoff, the airplane exited the runway to the left and impacted a tree.  The pilot stated that he lost control of the airplane during the initial takeoff roll.  An examination of the airplane failed to reveal any preexisting mechanical anomaly.

## Factual narrative

On August 1, 1996, at 1830 central daylight time, an Ultravia Aero International Pelican, C-FPWZ, sustained substantial damage during takeoff.  The airplane departed runway 36 at Winneconne, Wisconsin.  The pilot stated to responding authorities that he lost control of the airplane during the takeoff roll.  The pilot and one passenger were not injured.  The personal 14 CFR Part 91 flight was operating in visual meteorological conditions.  No flight plan was on file.   The flight was departing with an intended destination of Oshkosh, Wisconsin, at the time of the accident.

The pilot in a statement to local authorities and in a written statement stated that he lost control of the airplane during the initial takeoff roll.  The airplane exited the runway to the left and impacted a tree.

An examination of the airplane failed to reveal any preexistent mechanical anomalies.

## Aircraft

- Registration: CFPWZ (not matched to a registry record)
- Reported make and model: Ultravia Aero Int'l PELICAN
- Category: Airplane, amateur-built
- Serial number: 521
- Airframe hours: 1100
- Engines: Rotax 912 85 horsepower reciprocating
- Damage: Substantial damage
- Flight: Personal, Part 91
- Registered owner: Alm Pan Avion, Inc.
- Airworthiness certificate: Special, Experimental (Special)
- Last inspection: Unknown, May 2, 1996, 20 hours before
- Departed: 4D4
- Destination: OSH, OSHKOSH, WI
- Airport: 4D4, Courtney Plummer, runway 36, 3,400 ×  ft, asphalt

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 33; private; airplane ratings: single-engine land; medical: class 3, valid medical--no waivers/lim.; flight hours: 82 total, 24 in this make and model, 23 as pilot in command, 11 in the last 90 days, 11 in the last 30 days, 6 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: 220° at 3 knots
- Visibility: 10 statute miles
- Lowest ceiling: none
- Temperature: 73 °F, dew point 63 °F
- Altimeter: 29.00 inHg
- Observed at: OSH, 8 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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