ASN Wikibase Occurrence # 30386
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| Date: | Friday 1 October 1999 |
| Time: | 14:45 LT |
| Type: |  de Havilland Canada DHC-2 Beaver |
| Owner/operator: | Kenmore Air Harbor, Inc. |
| Registration: | N9766Z |
| MSN: | 504 |
| Year of manufacture: | 1953 |
| Total airframe hrs: | 30792 hours |
| Engine model: | P&W R-985-AN1 |
| Fatalities: | Fatalities: 0 / Occupants: 5 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | 16 km (10 mi) W of Seattle, WA -
 United States of America
|
| Phase: | En route |
| Nature: | Unknown |
| Departure airport: | Seattle, WA (0W0) |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
The pilot-in-command (PIC) departed Lake Union seaplane base with four British Broadcasting Company passengers aboard the DeHavilland DHC-2 'Beaver.' The passengers were engaged in aerial videography of an east/west geological fault line crossing from south Seattle through Blakely Harbor near the south end of Bainbridge Island. An onboard video recorder captured a voice instructing 'Keep as low as you can and slow as you can while we're doing this please... .' The PIC's first pass over the south end of Bainbridge Island was uneventful and the aircraft was maneuvered for a second pass. The PIC reported that approaching the upsloping, tree covered terrain he applied climb flaps and power but shortly thereafter realized the climb rate was less than he expected. He attempted a shallow left turn towards downsloping terrain and then leveled the wings as the aircraft descended into the treetops. The scenario was corroborated by two onboard video recordings. The pilot reported no powerplant or control system malfunction during the accident flight. He also reported encountering a downdraft condition over the tree covered terrain. Winds remained below 12 knots throughout the day at reporting stations near the accident site, and the video recordings showed no wind streaking and only sporadic whitecaps on the surface of Puget Sound during the transit from Seattle to the south end of Bainbridge Island.
Probable Cause: The pilot-in-command's failure to maintain adequate clearance from trees/terrain. Contributing factors were rising terrain and trees.
Accident investigation:
 |
|
Sources:
NTSB SEA00FA001
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 27-Sep-2008 01:00 | ASN archive | Added |
| 23-Oct-2017 17:14 | TB | Updated [Time, Total fatalities, Total occupants, Other fatalities, Location, Country, Phase, Nature, Departure airport, Destination airport, Source, Damage, Narrative] |
| 14-Dec-2017 11:34 | ASN Update Bot | Updated [Time, Operator, Nature, Departure airport, Destination airport, Source, Narrative] |
| 22-Nov-2018 21:51 | Aerossurance | Updated [Nature, Source, Narrative] |
| 07-Apr-2024 17:32 | ASN Update Bot | Updated [Time, Other fatalities, Nature, Source, Narrative, Category, Accident report] |
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