# NTSB SEA91LA030: Robinson Wenoso, N1041, Olympia, WA, December 7, 1990

- Type: NTSB accident investigation
- Classification: Accident · Fatal · Limited investigation · Final report
- Date: December 7, 1990, 15:50 local (23:50 UTC)
- Place: Olympia, WA
- Coordinates: 47.10004, -123.060974 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=47.1000&lon=-123.0610&mi=10
- Phase of flight: [Maneuvering](https://openairdocs.org/ntsb-phases/450) (OpenAirDocs' grouping)
- Highest injury: Fatal
- Injuries: 1 fatal
- Status: Completed, report November 9, 1992
- Report: Approved by Office Director
- NTSB case key (mKey): 41371
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=SEA91LA030
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/41371/pdf
- Page: https://openairdocs.org/ntsb/SEA91LA030

## Probable cause

THE INADVERTANT STALL/SPIN AND LOSS OF AIRCRAFT CONTROL BY THE PILOT IN COMMAND WHILE PERFORMING AEROBATIC MANEUVERS.

## Sequence of events

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

- Loss of control - in flight, maneuvering
  - aerobatics - performed, pilot in command (contributing factor)
  - stall/spin - inadvertent, pilot in command (cause)
- In flight collision with terrain/water, descent - uncontrolled

## Analysis

WHILE THE PILOT WAS PERFORMING AEROBATIC MANEUVERS, THE ACFT STALLED, ENTERED A SPIN AND IMPACTED THE GROUND IN A VERTICAL NOSE DOWN ATTITUDE.

## Aircraft

- Registration: [N1041](https://openairdocs.org/deregistered/N1041-1993-03-25), registration cancelled 1993-03-25, S/N HS1 (OpenAirDocs)
- Reported make and model: ROBINSON WENOSO
- Registry model: [Robert Shane Klase VELOCITY](https://openairdocs.org/model/robert-shane-klase-velocity) (registry code 05601ZK) (OpenAirDocs)
- Category: Airplane, amateur-built
- Serial number: H.S 1
- Engines: CONTINENTAL A65-8-F 75 horsepower reciprocating
- Damage: Destroyed
- Flight: Personal, Part 91
- Operator: Mathew J Kimbrel
- Registered owner: Unknown
- Airworthiness certificate: Special, Experimental (Special)
- Destination: NONE, OAKVILLE, WA

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 21; private; airplane ratings: single-engine land, multi-engine land; medical: class 2, valid medical--no waivers/lim.; toxicology performed; flight hours: 455 total

## Weather

- Conditions: Visual (VMC), Day
- Wind: 240° at 4 knots
- Visibility: 30 statute miles
- Lowest ceiling: 14,000 ft overcast
- Temperature: 45 °F, dew point 39 °F
- Altimeter: 30.00 inHg
- Observed at: OLM, 3 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 19901207053209A](https://openairdocs.org/incident/19901207053209A), Dec 7, 1990: Amtrwe WENDTTRAVLER, Olympia, WA, Destroyed, 1 fatal. Stalled during aerobatic maneuvers. Entered a spin. Failed to recover. Impacted in a vertical nose down attitude.

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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