# NTSB CHI90DEP02: Rotec Panther 2+, Holmen, WI, December 1, 1989

- Type: NTSB accident investigation
- Classification: Accident · Serious injuries · Final report
- Date: December 1, 1989, 11:00 local (17:00 UTC)
- Place: Holmen, WI
- Location: 43.9712° N, 91.2665° W: Placed by OpenAirDocs: center of Holmen, WI, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=43.9712&lon=-91.2665&mi=10
- Phase of flight: [Initial climb](https://openairdocs.org/ntsb-phases/350) (OpenAirDocs' grouping)
- Highest injury: Serious injuries
- Injuries: 1 serious
- Status: Completed, report September 30, 1991
- Report: Approved by Office Director
- NTSB case key (mKey): 14475
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=CHI90DEP02
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/14475/pdf
- Page: https://openairdocs.org/ntsb/CHI90DEP02

## Probable cause

INADVERTENT PARTIAL DEPLOYMENT OF THE EMERGENCY BALLISTIC RECOVERY PARACHUTE RESULTING IN A LOSS OF ENGINE THRUST AND AERODYNAMIC CONTROL OF THE AIRCRAFT.

## Sequence of events

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

- Airframe/component/system failure/malfunction, takeoff - initial climb
  - misc eqpt/furnishings,parachute/drag chute - deployed inadvertently (cause)
- Loss of engine power(total) - mech failure/malf, takeoff - initial climb
  - propeller system/accessories,blade - entangled (cause)
- Loss of control - in flight, takeoff - initial climb
  - flight control system - movement restricted (cause)
  - aircraft control - not possible, pilot in command (cause)

## Aircraft

- Registration: UNREG (not matched to a registry record)
- Reported make and model: ROTEC PANTHER 2+
- Category: Airplane, amateur-built
- Engines: ROTAX 522 65 horsepower reciprocating
- Damage: Substantial damage
- Flight: Personal, Part 91
- Registered owner: Tryggestad, Michael
- Destination: MY50, FRONTENAC, MN
- Airport: 09WI, Packway Farm

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 36; seat: front; flight hours: 72 total

## Weather

- Conditions: Visual (VMC), Day
- Wind: 170° at 5 knots
- Visibility: 10 statute miles
- Lowest ceiling: none
- Temperature: 37 °F, dew point 28 °F
- Altimeter: 30.00 inHg
- Observed at: LSE, 9 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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