# NTSB CHI89DEP11: Tierra II Panther 2 Plus, N22KK, Tomah, WI, August 23, 1989

- Type: NTSB accident investigation
- Classification: Accident · Minor injuries · Final report
- Date: August 22, 1989, 19:00 local (Aug 23, 1989, 00:00 UTC)
- Place: Tomah, WI
- Location: 43.9879° N, 90.5014° W: Placed by OpenAirDocs: center of Tomah, WI, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=43.9879&lon=-90.5014&mi=10
- Phase of flight: [Initial climb](https://openairdocs.org/ntsb-phases/350) (OpenAirDocs' grouping)
- Highest injury: Minor injuries
- Injuries: 1 minor, 1 uninjured
- Status: Completed, report September 5, 1991
- Report: Approved by Office Director
- NTSB case key (mKey): 14213
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=CHI89DEP11
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/14213/pdf
- Page: https://openairdocs.org/ntsb/CHI89DEP11

## Probable cause

THE PILOT'S PREMATURE LIFTOFF, WHICH RESULTED IN A STALL/MUSH AND SUBSEQUENTLY IMPACT ON THE RUNWAY.

## 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
  - lift-off - premature, pilot in command (cause)
  - stall/mush - inadvertent, pilot in command (cause)
- Airframe/component/system failure/malfunction, takeoff
  - terrain condition - runway

## Aircraft

- Registration: [N22KK](https://openairdocs.org/deregistered/N22KK-2013-08-22), registration cancelled 2013-08-22, S/N T2KK2, built 1985 (OpenAirDocs)
- Reported make and model: TIERRA II PANTHER 2 PLUS (PANTHER 2)
- Registry model: [Kuhn Kenneth C TERATORN II](https://openairdocs.org/model/kuhn-kenneth-c-teratorn-ii) (registry code 05676FP) (OpenAirDocs)
- Registry engine: [Bombardier ROTAX (ALL)](https://openairdocs.org/engine/bombardier-rotax-all) (registry code 09050, reciprocating) (OpenAirDocs)
- Category: Airplane, amateur-built
- Serial number: T2KK2
- Engines: BOMBARDIER ROTAX 64 horsepower reciprocating
- Damage: Substantial damage
- Flight: Personal, Part 91
- Registered owner: Kenneth C. Kuhn
- Airworthiness certificate: Special, Experimental (Special)
- Last inspection: Annual, July 17, 1989, 5 hours before
- Airport: YT2, Boger Field, runway 24, 3,900 × 76 ft, asphalt

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 51; commercial; airplane ratings: single-engine land; instrument ratings: airplane; medical: class 3, valid medical--w/ waivers/lim; seat: left; flight hours: 461 total, 15 in this make and model

## Weather

- Conditions: Visual (VMC), Day
- Wind: 360° at 5 knots
- Visibility: 15 statute miles
- Lowest ceiling: none
- Temperature: 84 °F, dew point 70 °F
- Altimeter: 29.00 inHg
- Observed at: GRB, 107 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 19890822031139A](https://openairdocs.org/incident/19890822031139A), Aug 22, 1989: Amtrre PANTHER2, Tomah, WI, Substantial damage. Porpoised on takeoff, became airborne and stalled out of ground effect. Homebuilt appeared to be underpowered.

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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