Pushing the R ENGINE FIRE pushbutton arms which extinguisher bottles for discharge?

Pushing the R ENGINE FIRE pushbutton is designed to arm both extinguisher bottles for discharge. This action ensures that in the event of a fire detected in the right engine, both fire extinguisher bottles can be released to fight the fire effectively. The redundancy of having two bottles increases the likelihood of successfully extinguishing the fire and addressing any potential hazards.

In many aircraft systems, especially those adhering to stringent safety protocols, the operation of fire extinguishing systems is set up to provide a dual-layer of defense. By arming both bottles when the R ENGINE FIRE pushbutton is pressed, it allows for a more reliable response, enabling the pilot or crew to manage the emergency with greater confidence. This ensures that if one bottle were to fail, the other can still function, maximizing safety during critical flight situations.