What is carbon monoxide poisoning and what should a pilot do if symptoms are detected?

8-1-4. Carbon Monoxide Poisoning in Flight
a. Carbon monoxide is a colorless, odorless, and tasteless gas contained in exhaust fumes. When breathed
even in minute quantities over a period of time, it can significantly reduce the ability of the blood to carry oxygen.
Consequently, effects of hypoxia occur.
b. Most heaters in light aircraft work by air flowing over the manifold. Use of these heaters while exhaust
fumes are escaping through manifold cracks and seals is responsible every year for several nonfatal and fatal
aircraft accidents from carbon monoxide poisoning.
c. A pilot who detects the odor of exhaust or experiences symptoms of headache, drowsiness, or dizziness
while using the heater should suspect carbon monoxide poisoning, and immediately shut off the heater and open
air vents. If symptoms are severe or continue after landing, medical treatment should be sought.