Carl,

Excellent post on Legacy CO problem.

Before N27RM "bit the dust", I had and will also have on the aircraft
when it is finished with the rebuild, a very sophisticated CO monitoring
installation.  During one and only one flight, this one the second test
flight after finishing the aircraft, I had a CO warning.  This occurred
at 9500 feet with the seal inflated, and no heat entering the cockpit.
I quickly opened both vents, pilot and copilot, and the warning went
away in less than two minutes while I was rapidly heading for home.

After landing, I could find nothing unusual, and never had a recurrence
in 115 hours.

Let me know what you find, please.  By the way, my new email address is
ghost1934@netzero.com

Ron Brice