What is required to reset a fire handle once it has been pulled?

To reset a fire handle once it has been pulled, stowing the handle is necessary. This process involves moving the handle back to its original position, thereby indicating to the system that any fire-related action should be ceased. It is a manual action that confirms the crew's assessment of the situation, allowing the aircraft's fire suppression system to return to its normal state.

In the context of aircraft systems, the fire handle usually has a mechanism that keeps it in the pulled position to prevent accidental reactivation of systems that have been disabled for safety during a fire scenario. Once the emergency situation has been addressed or deemed under control, properly stowing the handle is the correct procedure to ensure that systems can be reactivated safely if required.

Other options do not directly relate to the proper procedure for resetting the fire handle. For example, removing a fuse or pressing a reset button does not apply to the fire handle mechanism, and notifying the captain is part of standard communication protocol during an emergency, but it does not physically reset the handle itself.