182RG Reported Carbon Monoxide (likely coming from wheel wells).
I've had 182RG's for years and my most recent one I have a great digital CO reader (now that we all have the digital CO Detectors sold at any hardware store that we carry in cabins. << Scratch that for obvious reasons). About 6 years ago, after I got my digital CO, I saw the CO reading in ppm rise very high on high AOA situations (particularly climb out - - which for me could be a long time in SoCal since I'd go to 14k and cruise there). At cruise I wouldn't have the problem but didn't like being exposed to high levels for a half hour. I set to work big time. Had the entire exhaust overhauled. No luck. Resealed the entire thru-cables etc of the firewall and damn-well everything else you could think of. Even all door seals resealed (I was positive that would solve it, since this was near the end of my forensic search) -- and yes the wheel wells too.
AND THEN the last thing to look at (and yet now that you look at it . . IT SHOULD'VE BEEN THE FIRST THING I looked at, since it seems so obvious now, and that every other 182RG pilot should look at) is the rear cabin door latch!!! Look at it. It's a perfect aerodynamic air scoop facing into the oncoming wind (and exhaust flow). When you take the liner out of the baggage door and look at the baggage door thumb-latch (read: air scoop) you can see how the exhaust that comes from the left side of the plane wraps straight up to that air scoop after take off and gets sucked immediately/perfectly into the cabin. We resealed that rear baggage door and re-seated the latch (read: air scoop, perfect-designed-exhaust-scoop) and sealed the inside cover around it -- and oila! Problem solved. My digital CO has read "0" ppm for all phases of flight in all conditions. Please make sure this info gets to that pilot inquiring (and others). Could save their lives.
I can't help but wonder how many 182RG pilots have been sucking on CO for years and not knowing -- I've even read about a couple of accidents (read: 182RG in Santa Monica airport approach where pilot went incommunicative and went straight into a mountain about 3 or 4 years ago for no reason). The CO is not insignificant - - mine was reading 200 ppm to sometimes 400 ppm. So you really need to get the word out. Frankly, IMHO there should be an AD out on that air scoop (I mean rear-baggage thumb-latch)
Wright Brothers Master Pilot, FAA Commercial Pilot
Aviation Director, Cessna Owners Organization Forum Moderator and Cessna Owners Author.
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