# NTSB CHI89DEP12: Schuning/Teratorn Terra II, N87KS, New Berlin, WI, June 25, 1989

- Type: NTSB accident investigation
- Classification: Accident · Serious injuries · Final report
- Date: June 25, 1989, 11:30 local (16:30 UTC)
- Place: New Berlin, WI
- Coordinates: 42.969367, -88.120567 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=42.9694&lon=-88.1206&mi=10
- Phase of flight: [Approach](https://openairdocs.org/ntsb-phases/500) (OpenAirDocs' grouping)
- Highest injury: Serious injuries
- Injuries: 2 serious
- Status: Completed, report July 29, 1992
- Report: Approved by Office Director
- NTSB case key (mKey): 14214
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=CHI89DEP12
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/14214/pdf
- Page: https://openairdocs.org/ntsb/CHI89DEP12

## Probable cause

FAILURE OF THE PILOT TO MAINTAIN ADEQUATE AIRSPEED DURING THE GO-AROUND, WHICH RESULTED IN AN INADVERTENT STALL.

## Sequence of events

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

- Loss of control - in flight, go-around (vfr)
  - go-around - initiated, pilot in command
  - airspeed - not maintained, pilot in command (cause)
  - stall - inadvertent, pilot in command (cause)
- In flight collision with terrain/water, descent - uncontrolled

## Analysis

AFTER INITIATING A GO-AROUND FROM A VFR APPROACH TO LAND, THE EXPERIMENTAL CUSTOM BUILT AIRCRAFT ENTERED A DESCENT & CRASHED.  SUBSEQUENT INSPECTION OF THE AIRCRAFT FAILED TO REVEAL ANY ANOMALY THAT WOULD HAVE CONTRIBUTED TO THE EVENT.

## Aircraft

- Registration: [N87KS](https://openairdocs.org/deregistered/N87KS-2013-04-09), registration cancelled 2013-04-09, S/N 622053, built 1987 (OpenAirDocs)
- Reported make and model: SCHUNING/TERATORN TERRA II
- Registry model: [Schuning Re/Schram KM TERATORN TIERRA II](https://openairdocs.org/model/schuning-re-schram-km-teratorn-tierra-ii) (registry code 05676W5) (OpenAirDocs)
- Registry engine: [Bombardier ROTAX (ALL)](https://openairdocs.org/engine/bombardier-rotax-all) (registry code 09050, reciprocating) (OpenAirDocs)
- Category: Airplane, amateur-built
- Serial number: 622053
- Engines: BOMBARDIER ROTAX 65 horsepower reciprocating
- Damage: Destroyed
- Flight: Personal, Part 91
- Operator: David V. Lewis
- Registered owner: Schuning Richard E
- Airworthiness certificate: Special, Experimental (Special)

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 22; commercial; airplane ratings: single-engine land; instrument ratings: helicopter; medical: class 2, valid medical--no waivers/lim.; seat: left; flight hours: 580 total, 8 in this make and model

## Weather

- Conditions: Visual (VMC), Day
- Wind: calm
- Visibility: 15 statute miles
- Lowest ceiling: none
- Temperature: 81 °F, dew point -0 °F
- Altimeter: 30.00 inHg
- Observed at: VES

## 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 19890625033889A](https://openairdocs.org/incident/19890625033889A), Jun 25, 1989: Amtrte TIERRA2, New Berlin, WI, Substantial damage. Touch and go landings. Steep turn followed by steep dive and impact with ground.

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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