What is the first action you should take if you suspect carbon monoxide poisoning in the cockpit?

• A. Move to fresh air
• B. Administer oxygen
• C. Check for leaks
• D. Notify ATC

Answer: (A)

When carbon monoxide poisoning is suspected, the immediate priority is to get out of the contaminated air and into fresh air. Carbon monoxide binds strongly to hemoglobin, forming carboxyhemoglobin and severely reducing the blood’s ability to carry oxygen. Moving to fresh air stops further inhalation of CO and allows ventilation to dilute and clear the gas, helping to restore oxygen delivery to tissues. After you’ve secured a breath of clean air, providing 100% oxygen as soon as possible helps displace CO from hemoglobin and speeds recovery. While checking for leaks or notifying ATC are important steps, they don’t address the life-threatening exposure as quickly as removing yourself from the source and beginning oxygen therapy.