Tim / Paul: found a good general reference to CO2, aircraft incidents, info etc.
http://www.aeromedix.com/aeromedix_arti ... index.html
As we know CO2 is incomplete burning of aviation fuel, problem is, this CO2 is colourless and odourless. Difficult to pin point the source. Starting point is the engine compartment however, you could further investigate using smoke tracers:
http://store.metermall.com/air-flow--tr ... ke-c2.aspx
I recommend to check for possible leaks:
1. exhaust pipe connections / exhaust gaskets missing or worn
2. exhaust welded joints check cracks (LPI) liquid penetrate inspection
3. heat muffs/ heating system ducting/ heat system parts / elbows, flanges
4. firewall seals / missing or worn grommets
5. look at where the exhaust pipes end. Possible CO2 leaks under the floor boards / fuselage/ canopy into cabin. You may have to use sealant to seal holes, gaps or minor openings.
For pressurised aircraft you can smoke inside the aircraft and look for tar / nicotine stains at the cabin points of air exit. The smoke tracers show point of entry smoke will migrate into cabin if there is a point of entry.
This links discusses possible CO2 leak sources:
http://www.amtonline.com/publication/ar ... 1&id=11923
I have not used the pocket CO2 detectors. So I can not speak on its reliability. I do believe the Thorp is built to higher, tighter standards not with standing this detector is a small price to pay for your safety.
Good luck with the leak.
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) the maintainers maintain (!!) they are good.
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