Internal Fire (Cabin, Electrical, and/or Avionics): Which is the first corrective action?

Internal Fire (Cabin, Electrical, and/or Avionics): Which is the first corrective action?

• A. Confirm/Suppress Fire
• B. Affected Equipment Off
• C. Affected Circuit Breakers Pull
• D. Heat/Cool Switches Off

Answer: (A)

The action that matters first is confirming that a fire exists and initiating suppression right away. When an internal fire starts, the immediate priority is to control the hazard by stopping the fire itself — using the fire suppression system or extinguishing methods — so heat and smoke are cut off at the source and you gain time to assess and react. Only after the fire is being actively suppressed do you move on to removing power to affected equipment, pulling circuit breakers to isolate the fault, and turning off the heat/cool system to reduce ventilation that could feed the fire. These subsequent steps help prevent reignition and further spread, but they hinge on already having the fire under initial control.

The action that matters first is confirming that a fire exists and initiating suppression right away. When an internal fire starts, the immediate priority is to control the hazard by stopping the fire itself — using the fire suppression system or extinguishing methods — so heat and smoke are cut off at the source and you gain time to assess and react. Only after the fire is being actively suppressed do you move on to removing power to affected equipment, pulling circuit breakers to isolate the fault, and turning off the heat/cool system to reduce ventilation that could feed the fire. These subsequent steps help prevent reignition and further spread, but they hinge on already having the fire under initial control.