# Accident 20170603007949A: Paul R Seipt SONEX, Garfield, WA, June 3, 2017

- Type: FAA accident report (Accident/Incident Data System), as reported
- Date: June 3, 2017, 11:09 local time
- Place: Garfield, WA
- Damage: Substantial damage
- Phase of flight: Cruise/Level Flight
- Operating rules: General operating rules (Part 91)
- Location: 46.9914° N, 117.1272° W: From the FAA
- Nearby events: https://openairdocs.org/map.md?lat=46.9914&lon=-117.1272&mi=10
- Aircraft: N255BZ, a cancelled registration (https://openairdocs.org/deregistered/N255BZ-2017-08-14) (OpenAirDocs)
- Registry model: Paul R Seipt SONEX (registry code 05634JI, https://openairdocs.org/model/paul-r-seipt-sonex) (OpenAirDocs)
- Registry engine: Aerovee 2.0 (registry code 01403, https://openairdocs.org/engine/aerovee-2-0) (OpenAirDocs)
- Reported make and model: PAUL R SEIPT SONEX
- Reported engine: AEROVEE 2.0
- People aboard: 1
- Fatal injuries: 0
- Other injuries: 0
- Pilot certificates: Private pilot
- Pilot flight hours: 270 total, 93 in this make and model, 40 in the last 90 days
- NTSB investigation: [NTSB WPR17LA119](https://openairdocs.org/ntsb/WPR17LA119) (OpenAirDocs)
- FAA source: FAA Aviation Safety Information Portal (https://asip.faa.gov/)
- Page: https://openairdocs.org/incident/20170603007949A

## Narrative

As the FAA filed it, in capitals; the FAA replaces private details with ^PRIVACY DATA OMITTED^.

AIRCRAFT DEPARTED SPOKANE, FELTS FIELD ENROUTE TO PULLMAN, WA. WHILE IN CRUISE  FLIGHT AT 4000' MSL OVER GARFIELD WA, PILOT NOTICED SMALL VIBRATION IN ENGINE THEN SUBSEQUENTLY THE PROPELLER SEPARATED FROM AIRCRAFT. PILOT MADE A FORCED LANDING ON STATE ROUTE 27 APPROXIMATELY 1.5 MILES SOUTH OF GARFIELD AT MILE MARKER 23. EXAMINATION OF FRONT ENGINE CASE, INDICATES  CRANKSHAFT SEPARATION AT PROPELLER FLANGE  AND MAIN FORWARD ENGINE BEARING.

## The NTSB's investigation of this event (1)

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.

- [NTSB WPR17LA119](https://openairdocs.org/ntsb/WPR17LA119), Jun 3, 2017: Paul R Seipt Sonex (N255BZ), Garfield, WA, substantial damage. Probable cause: The pilot’s improper torque of screws that attached the flywheel mounting flange to the crankshaft during engine assembly, which resulted in heavy vibrations and the subsequent in-flight loss of the…

From the FAA Accident/Incident Data System. Reports are matched to registry aircraft by N-number and event date, checked against the reported make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model. For accidents, the NTSB's own investigation is the fuller record.

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