ASN Wikibase Occurrence # 70221
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| Date: | Sunday 29 November 2009 |
| Time: | 14:08 |
| Type: |  de Havilland Canada DHC-2 Beaver |
| Owner/operator: | Seair Seaplanes |
| Registration: | C-GTMC |
| MSN: | 1171 |
| Year of manufacture: | 1957 |
| Fatalities: | Fatalities: 6 / Occupants: 8 |
| Aircraft damage: | Destroyed |
| Category: | Accident |
| Location: | Lyall Harbour, BC -
 Canada
|
| Phase: | Take off |
| Nature: | Passenger - Scheduled |
| Departure airport: | CYAJ |
| CAM9 | |
| Investigating agency: | TSB |
| Confidence Rating: |  Information verified through data from accident investigation authorities |
Aircraft crashed on departure from Lyall Harbour on Saturna Island en route to Vancouver Intl Seaplane Base (CAM9), wreckage was located in 11 metres of water. Weather was poor with high winds, the pilot and one passenger survived.
Seair Beaver C-GTMC appeared in Harrison Ford's 1998 movie, Six Days Seven Nights.
CONCLUSIONS
Findings as to Causes and Contributing Factors
- The combined effects of the atmospheric conditions and bank angle increased the load factor, causing an aerodynamic stall.
- Due to the absence of a functioning stall warning system, in addition to the benign stalling characteristics of the Beaver, the pilot was not warned of the impending stall.
- Because the aircraft was loaded in a manner that exceeded the aft CG limit, full stall recovery was compromised.
- The altitude from which recovery was attempted was insufficient to arrest descent, causing the aircraft to strike the water.
- Impact damage jammed 2 of the 4 doors, restricting egress from the sinking aircraft.
- The pilot's seat failed and he was unrestrained, contributing to the seriousness of his injuries and limiting his ability to assist passengers.
Findings as to Risk
- There is a risk that pilots will inadvertently stall aircraft if the stall warning system is unserviceable or if the audio warnings have been modified to reduce noise levels.
- Pilots who do not undergo underwater egress training are at greater risk of not escaping submerged aircraft.
- The lack of alternate emergency exits, such as jettisonable windows, increases the risk that passengers and pilots will be unable to escape a submerged aircraft due to structural damage to primary exits following an impact with the water.
- If passengers are not provided with explicit safety briefings on how to egress the aircraft when submerged, there is increased risk that they will be unable to escape following an impact with the water.
- Passengers and pilots not wearing some type of flotation device prior to an impact with the water are at increased risk of drowning once they have escaped the aircraft.
Accident investigation:
 |
|
Sources:
http://www.avcanada.ca/forums2/viewtopic.php?f=54&t=60487&p=569794#p569794
https://www.seairseaplanes.com/index.php
http://www.dhc-2.com/id348.htm
[LINK NOT WORKING ANYMORE:http://www.bst-tsb.gc.ca/eng/medias-media/majeures-major/aviation/A09P0397/MI-A09P0397.asp]
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 29-Nov-2009 21:01 | robbreid | Added |
| 29-Nov-2009 23:57 | gallo | Updated |
| 30-Nov-2009 03:40 | robbreid | Updated |
| 30-Nov-2009 07:25 | Anon. | Updated |
| 30-Nov-2009 10:35 | harro | Updated |
| 30-Nov-2009 17:41 | RobertMB | Updated |
| 30-Nov-2009 20:14 | slowkid | Updated |
| 30-Nov-2009 22:24 | robbreid | Updated |
| 25-Jul-2010 13:33 | TB | Updated [Aircraft type, Source, Narrative] |
| 17-Mar-2011 14:31 | harro | Updated [Source, Narrative] |
| 14-Aug-2011 02:41 | TB | Updated [Location, Source, Narrative] |
Corrections or additions? ... Edit this accident description
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