What does the FURN switch control in the cockpit?

The FURN switch in the cockpit controls the air conditioning and heating systems within the cabin, which includes the distribution of AC power to cabin outlets. This switch is essential for maintaining a comfortable environment for the crew and any passengers on board. The operation of cabin outlets is directly linked to the provision of power that is used to run various electronic devices and systems in the cockpit.

While other functions like landing gear operation, fuel flow management, and electrical system monitoring are critical systems in an aircraft, they are controlled by other switches and systems separate from the FURN switch. Understanding the specific role of the FURN switch highlights its importance in ensuring that the cabin environment remains regulated and functional during flight operations, facilitating the overall safety and comfort of the aircraft's occupants.