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My 'coupe had just passed its annual - the AME (A&P) had gone through the exhaust system and gave it a clean bill of health. About 2 months later when the weather started getting really cold I started closing up the covers - one day I looked at the "yellow dot" indicator which had gone a sickening green colour. Before I myself became another "statistic" I opened the windows up and flew back to my base to get things checked out. Turns out that there was a leak in the #1 stack where the stack itself meets the cylinder head - the gasket had blown and there was enough of a leak to make things a bit exciting. Looks like the leak had been there for awhile - but wasn't apparent enough to see during the annual. All the pipes were solid - it was the mating surface to the cylinder that had failed.
Subsequently I replaced all the exhaust gaskets with the no-blow variety (and had a new set of exhaust pipes fabricated - it wasn't worth fixing the old ones).
I certainly wouldn't fool with that again - I used a portable 12V CO detector from that point onwards.
John - who used to own CF-RGD ============================================================================== To leave this forum go to: http://ercoupers.com/lists.htm Search the archives on http://escribe.com/aviation/coupers-tech/
