# Accident 20051007025929A: Beech G35, Eugene, OR, October 7, 2005

- Type: FAA accident report (Accident/Incident Data System), as reported
- Date: October 7, 2005
- Place: Eugene, OR
- Airport: Mahlon Sweet Field
- Damage: Substantial damage
- Phase of flight: Descent
- Operating rules: General operating rules (Part 91)
- Location: 46.1631° N, 122.9486° W: From the FAA
- Nearby events: https://openairdocs.org/map.md?lat=46.1631&lon=-122.9486&mi=10
- Aircraft: N4647D, registered now (https://openairdocs.org/aircraft/N4647D) (OpenAirDocs)
- Registry model: Beech G35 (registry code 1151516, https://openairdocs.org/model/beech-g35) (OpenAirDocs)
- Registry engine: Continental E225 series (registry code 17015, https://openairdocs.org/engine/continental-e225-series) (OpenAirDocs)
- Reported make and model: BEECH G35
- Reported engine: CONT E2258
- People aboard: 1
- Fatal injuries: 0
- Pilot flight hours: 378 total, 220 in this make and model, 23 in the last 90 days
- NTSB investigation: [NTSB SEA06LA004](https://openairdocs.org/ntsb/SEA06LA004) (OpenAirDocs)
- FAA source: FAA Aviation Safety Information Portal (https://asip.faa.gov/)
- Page: https://openairdocs.org/incident/20051007025929A

## Narrative

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

(-23) THE PILOT ^PRIVACY DATA O^ STATES HE WAS DESCENDING AT 180MPH INTO PORTLAND, OREGON (PDX) AIRSPACE AT 8000' AGL WHEN HE EXPERIENCED A SUDDEN AND VIOLENT SHAKING OF THE AIRCRAFT. THE PILOT ^PRIVACY DA^ PUT POSITIVE FORCE ON THE RUDDER PEDALS AND PULLED BACK ON THE YOKE AND THE SHAKING STOPPED. CONTROLLABILITY DID NOT CHANGE SO HE CONTINUED HIS FLIGHT LANDING WITHOUT INCIDENT IN EUGENE, OREGON (EUG). INVESTIGATION REVEALED AN UNKNOWN EVENT IN SMOOTH AIR THAT CAUSED SUBSTANTIAL EMPENNAGE STRUCTURAL OVERLOAD AND SUBSEQUENT DAMAGE AFT OF THE 256.9 BULKHEAD.

## 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 SEA06LA004](https://openairdocs.org/ntsb/SEA06LA004), Oct 7, 2005: Beech G35 (N4647D), Longview, WA, substantial damage. Probable cause: Ruddervator flutter which resulted in the buckling of the empennage. The reason for the ruddervator flutter was undetermined.

## Other reports on N4647D (3)

Matched to the same aircraft by N-number and date.

- [Accident 20020701016249A](https://openairdocs.org/incident/20020701016249A), Jul 1, 2002: Beech G35 (N4647D), Yakima, WA, No damage. (-23) Pilot john cosman ii and wife jane were transitioning into the ykm airport at 5000 MSL with clearance to land while crossing the last ridge when the…
- [Incident 19790608015769I](https://openairdocs.org/incident/19790608015769I), Jun 8, 1979: Beech G35 (N4647D), Waukesha, WI, Minor damage. Pilot intended to retract flaps after touchdown. Got the wrong switch
- [Accident 19731006034269A](https://openairdocs.org/incident/19731006034269A), Oct 6, 1973: Beech G35 (N4647D), Manitowish W, WI, Substantial damage. Plt did not allow time for gear to fully extend. Push pull rod failed aft end,ldg gr housing dmgd.

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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