During Smoke/Fumes procedure, which action is included?

• A. Oxygen Masks (if required) - Don and 100%; Crew Communication - Establish
• B. Oxygen Masks - Don and 100%; Crew Communication - Standby
• C. Oxygen Masks - Don and 50%; Crew Communication - Establish
• D. Oxygen Masks - Don and 100%; Crew Communication - Establish; Captain assumes PF duties

Answer: (A)

When smoke or fumes appear, the first priority is to protect the crew and establish a clear plan of action. Donning the oxygen masks and selecting 100% oxygen immediately ensures you’re delivering the maximum, uncontaminated supply of breathing gas, which is crucial to prevent hypoxia and keep you alert in a hazardous environment. At the same time, you need to establish crew communication right away so everyone knows their roles, understands the situation, and can coordinate tasks—such as managing the cockpit, assisting passengers if needed, and preparing for any further steps like diverting or landing.

Choosing 50% oxygen wouldn’t provide enough protection in smoke and fumes, which is why that option isn’t suitable. Standing by rather than establishing communication delays critical coordination, so that’s not appropriate in this scenario. The detail about a captain assuming the pilot-flying duties is not the immediate action required by the procedure itself; the essential steps are getting everyone protected with oxygen and communicating to organize the response.