ASN Wikibase Occurrence # 38177
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| Date: | Saturday 17 July 1999 |
| Time: | 13:00 LT |
| Type: |  Cessna T337G Turbo Super Skymaster |
| Owner/operator: | Dennis L. Waldock |
| Registration: | N98C |
| MSN: | P3370135 |
| Year of manufacture: | 1973 |
| Total airframe hrs: | 2025 hours |
| Engine model: | Continental TSIO-360-C |
| Fatalities: | Fatalities: 2 / Occupants: 2 |
| Aircraft damage: | Destroyed |
| Category: | Accident |
| Location: | Snoqualmie Pass, WA -
 United States of America
|
| Phase: | Manoeuvring (airshow, firefighting, ag.ops.) |
| Nature: | Private |
| Departure airport: | Lewistown, MT (LWT |
| Seattle, WA (KBFI) | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
While en route from Lewistown, Montana, to Olympia, Washington, on an instrument flight plan, the pilot developed a problem with the aircraft's autopilot and elected to cancel his instrument flight plan and proceed to Seattle, Washington, where repairs to the aircraft could be made. The pilot stated he was going to continue on his IFR flight plan until reaching Ellensburg, Washington, and then '...change to VFR and drop down and fly through the pass.' Approximately 30 minutes after the pilot canceled his IFR flight plan, a witness observed an aircraft 'with two tail fins' fly out of the clouds and proceed westbound along the Interstate Highway. The witness, who did not see the crash, also stated that the visibility was 100-300 feet, and the clouds were low to the ground. The aircraft collided with mountainous terrain approximately 25 miles east of Seattle, Washington.
Probable Cause: The pilot's failure to maintain clearance from mountainous terrain while maneuvering below low ceilings. Factors include low ceilings and inadequate in-flight planning.
Accident investigation:
 |
|
Sources:
NTSB SEA99FA126
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 24-Oct-2008 10:30 | ASN archive | Added |
| 21-Dec-2016 19:23 | ASN Update Bot | Updated [Time, Damage, Category, Investigating agency] |
| 14-Dec-2017 08:40 | ASN Update Bot | Updated [Operator, Source, Narrative] |
| 07-Apr-2024 19:11 | ASN Update Bot | Updated [Time, Operator, Other fatalities, Phase, Departure airport, Destination airport, Source, Narrative, Category, Accident report] |
Corrections or additions? ... Edit this accident description
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