Posted for "Lewis, Charles" <CSLEWIS@stoel.com>:

I am looking forward to the inflatable canopy seal, but I am waiting until after paint next month to install it.  In the meantime, I have a piece of weather stripping stuck on that is a huge improvement over the previous nothing (which I didn't think was all that bad until it got cold).  Which brings me to my question for Legacy flyers (and maybe 320/360 flyers as well):  On two occasions recently, I had a high CO warning while flying my airplane.  I have 82 hours on the airplane now, and this is a very recent development.  It has happened only since I added the temporary weather stripping to seal the canopy, and only when the vents are closed.  Opening the pilot-side vent caused the warning to go away in about three minutes.  On both occasions when this occurred, the heat was off and there was a passenger in the airplane.

It seems to me that I must be drawing exhaust into the cockpit.  I have borrowed a digital monitor from fellow Legacy flyer John Halle to see what I have in terms of PPM, but weather has so far prevented me from flying with it.  It seems to me that the most likely suspects are exhaust being drawn into the tail (I understand that this is a common problem with RVs), or exhaust being drawn in through the gear wells.  As far as I know, John has not had this problem with his airplane, but I am not sure what his CO monitoring situation has been.  The only difference between our airplanes that I can think of that might affect this is that I have a vent in the aft baggage bulkhead that is intended to give the vent air a place to exit.  This would make it easier for air to be drawn in from the tail.

Despite the vent difference, I have felt that the gear well source is the more likely.  I have not developed any sort of boots over the inner gear door arms and the aileron pushrods, but I am now thinking about how to do that.  Can anyone help out with thoughts about this?  Thanks in advance.

Happy New Year!

Carl Lewis
L2K-203  N14CL