Originally Posted by Wilbelsturm
For engine fire and emergency shut down the fuel cutoff switches must be selected to cutoff before the fire handle is pulled.
While the above statement is procedurally correct and proper, the fire handles can still be pulled with the engine fuel control switches in RUN, by pushing the fire handle override buttons in order to release the mechanical locks. (this would be unnecessary if there was an active fire warning for the associated engine)
This is because there needs to be a
separate and independent means to shutdown an engine.