# NTSB SEA91LA210: Weyerts Rans S-10, N35PR, Stanwood, WA, August 17, 1991

- Type: NTSB accident investigation
- Classification: Accident · Fatal · Limited investigation · Final report
- Date: August 17, 1991, 10:20 local (17:20 UTC)
- Place: Stanwood, WA
- Coordinates: 48.210643, -122.279724 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=48.2106&lon=-122.2797&mi=10
- Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping)
- Highest injury: Fatal
- Injuries: 1 fatal
- Status: Completed, report September 28, 1992
- Report: Approved by Office Director
- NTSB case key (mKey): 41514
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=SEA91LA210
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/41514/pdf
- Page: https://openairdocs.org/ntsb/SEA91LA210

## Probable cause

AN UNDETERMINED LOSS OF ENGINE POWER AND THE PILOT'S ALLOWING THE AIRSPEED TO DECELERATE BELOW THE STALL SPEED DURING THE SUBSEQUENT FORCED LANDING.

## Sequence of events

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

- Loss of engine power, cruise
- Forced landing, descent - emergency
- In flight collision with terrain/water, descent - emergency

## Analysis

THE PILOT OF THE SINGLE ENGINE HOMEBUILT AIRCRAFT WAS ON A RECREATIONAL FLIGHT DURING WHICH THE ONLY EYEWITNESS REPORTED HEARING THE AIRCRAFT'S ENGINE 'SPUTTERING' AND 'REVVING'.  THE WITNESS REPORTED THE AIRCRAFT IN LEVEL FLIGHT AT 300-400 FEET ALTITUDE.  THE AIRCRAFT CRASHED IN AN OPEN GRASSY FIELD.  ONE BLADE OF THE WOODEN PROPELLER WAS OBSERVED SEPARATED WITH THE REMAINING BLADE STILL ATTACHED TO THE ENGINE AND RELATIVELY UNDAMAGED.  UPWARD AND DOWNWARD AFT BENDING DEFORMATION WAS EVIDENT ON THE RIGHT AND LEFT WINGTIPS RESPECTIVELY AT THE ACCIDENT SITE.  THE PILOT WAS UNABLE TO RECALL THE ACCIDENT SCENARIO AND EXPIRED 7 DAYS AFTER THE ACCIDENT.

## Aircraft

- Registration: [N35PR](https://openairdocs.org/deregistered/N35PR-2017-06-30), registration cancelled 2017-06-30, S/N 0288006 (OpenAirDocs)
- Reported make and model: WEYERTS RANS S-10
- Registry model: [Weyerts Ray RANS S-10](https://openairdocs.org/model/weyerts-ray-rans-s-10) (registry code 05616RM) (OpenAirDocs)
- Category: Airplane, amateur-built
- Serial number: 0288006
- Engines: ROTAX 532 reciprocating
- Damage: Destroyed
- Flight: Personal, Part 91
- Operator: Raymond H. Weyerts
- Registered owner: Raymond H. Weyerts
- Departed: S88, ARLINGTON, WA

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 56; private; airplane ratings: single-engine land; medical: class 3, valid medical--no waivers/lim.; flight hours: 254 total, 2 in the last 30 days

## Weather

- Conditions: Visual (VMC), Day
- Wind: 240° at 7 knots
- Visibility: 7 statute miles
- Lowest ceiling: none
- Temperature: -0 °F, dew point -0 °F
- Observed at: S76, 13 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 19910817034559A](https://openairdocs.org/incident/19910817034559A), Aug 17, 1991: Amtr RANSS9, Stanwood, WA, Destroyed, 1 fatal. Wreckage indicates a spin or spiral at impact. No witnesses. No defects in aircraft or engine noted.

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.

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.