Re: Towplane/Cirrus mid air in Boulder
I would be interested to know the source of the statistic that 90% of Cirrus crashes result in fire.
It was more or less a quote from a comment made a couple of years back by a senior NTSB investigator during lunch. The comment was (as close as I can recall) "I shudder when I hear we have a Cirrus crash because I know 9 for 10, the aircraft is going to be too burned up to tell us much about what happened. About the only time those damn things don't burn is when you run them dry first or crash into water." I'm not sure if it's really 90% of serious crashes, but I'm willing to bet you lunch at Oshkosh this year that it's at least 70%.
For those interested in what kills people in these crashes, here's the full breakdown of
Cirrus fatalities in the US; (crashes with survivors are listed as having such):
12/15/2009 SR-22
Missing in Gulf of Mexico
9/11/2009 SR-22 Blunt trauma
7/30/2009 SR-22 Blunt trauma with hypoxia as a contributing factor
6/16/2009 SR-22 Data not available last time I checked
4/28/2009 SR-22 Blunt trauma for both occupants
2/17/2009 SR-20 Blunt trauma
1/30/2009 SR-20 Blunt trauma for all occupants
1/29/2009 SR-22 Data not available last time I checked
11/13/2008 SR-22 Blunt trauma
9/11/2008 SR-22 Data not available last time I checked
8/10/2008 SR-22 Blunt trauma (mid-air collision with Cessna R172K)
4/22/2008 SR-22 Blunt trauma
4/8/2008 SR-22 Blunt trauma
3/20/2008 SR-22 Blunt trauma
3/14/2008 SR-22 Blunt trauma
2/2/2008 SR-22 Blunt trauma
12/30/2007 SR-22 Probably blunt trauma
11/25/2007 SR-22 Blunt trauma
11/21/2007 SR-20 Blunt trauma
12/18/2006 SR-22 Blunt trauma
11/30/2006 SR-22 Blunt trauma
10/27/2006 SR-22 Blunt trauma
(crash had two survivors)
10/25/2006 SR-22 Blunt trauma
10/11/2006 SR-22 Blunt trauma (Cory Lidle crash)
9/15/2006 SR-20 Blunt trauma
8/28/2006 SR-22 Blunt trauma
7/11/2006 SR-22 Blunt trauma (survived for three weeks in ICU after crash)
2/4/2006 SR-22 Blunt trauma
1/9/2006 SR-20 Blunt trauma
12/29/2005 SR-22 Blunt trauma
12/11/2005 SR-22 Data not available last time I checked
2/6/2005 SR-22 Data not available last time I checked
1/20/2005 SR-22 "Blunt and sharp force trauma" (impaled by tree branch through chest after being thrown from the aircraft, if I recall correctly)
1/15/2005 SR-22 Blunt trauma
12/4/2004 SR-22 Blunt trauma
(1 survivor)
9/10/2004 SR-22 Blunt trauma
4/19/2004 SR-20 Blunt trauma
1/23/2003 SR-20 Blunt trauma
1/18/2003 SR-22 Unknown
11/3/2002 SR-20 Blunt trauma
5/28/2002 SR-20
Thermal trauma, smoke inhalation
4/24/2002 SR-22 Unknown
4/10/2001 SR-20 Unknown
3/23/1999 SR-20 Blunt trauma
As for the number of fires, give me a while to pull the data together. Normally 10-20% (variability depending upon the inclusion or exclusion of airliner crash data; if anyone wants more specific data on this, let me know and I will pull it together) of fatalities in aircraft crashes are due to fire or the toxic products associated with fire. I'm not home at the moment so I can't exactly drop what I'm doing.
It
possibly points to serious issues with the structural integrity of the passenger compartment of the aircraft as being the more serious issue with survivability rather than the fuel tank issue. I am not saying the fuel tanks are
the problem- they are
A problem, one of several. What I will say is that if you don't address the obvious issue with fires now (at the same time the other issues are dealt with), you will see a shift in the mortality while not seeing an overall decrease in morbidity and mortality even if you were to correct the structural issues related to cockpit integrity.
What would happen is if you increase the integrity of the cockpit, etc and left the fire issue unaddressed it would give those who don't believe safety improvements are of value ammunition to use because the mortality would still be higher than with other aircraft, just with a different source ("See! All those expensive changes and the aircraft is still killing people at the pretty much same rate!"). Safety is not a zero sum, all or nothing sort of affair. Several problems, several solutions and saying "Oh well, most people don't live to burn alive anyhow" is not a valid argument from a safety standard, even if it is technically true.