On Thu, 01 Apr 2004 23:31:51 -0600, "O. Sami Saydjari"
wrote:

I purchased a C0 Experts Model 2002 about 1 month ago (it is quite
precise and I am generally pleased with it). When I am climbing out
from take-off, I am experiencing relatively high readings of CO, on the
order of 30 Parts Per Million (PPM). This only lasts about 20 minutes
or so. At cruise, it drops to below 10 PPM (considered normal).

(a) Does anyone else have any hard data about their CO concentration
levels in various phases of flight?

(b) I have read that anything above 10 PPM should be checked by an A&P,
but I have read elsewhere that something like 30PPM for short periods is
not a big deal. Are there any medical-types out there that can weigh in
on this issue?

I had a home type CO monitor supposedly sensitive to 1-3ppm. It would
occasionally read 25ppm if I was on the ground and behind another a/c. It
would rarely alarm on the ground when I was not behind another a/c. I
suspected that had to do with wind blowing exhaust in a particular
direction.

It always dropped to undetectable levels during the takeoff roll.

30ppm for a few minutes won't damage you, but I'd sure have your exhaust
system checked by a competent technician.


Ron (EPM) (N5843Q, Mooney M20E) (CP, ASEL, ASES, IA)