Overheat / Fire Protection Panel
Engine Fire Warning Switch

Illuminated –

Note: Master FIRE WARN lights illuminate and fire warning
bell sounds.

Down – normal position.

The switch is mechanically locked down if there is no fire
signal.
Up –










Rotate (left or right) – discharges the related fire bottle.

  • Indicates a fire in the related engine.
  • Unlocks the related engine fire warning switch.

  • Arms one discharge squib on each engine fire
    extinguisher.
  • Closes the related fuel, hydraulic shutoff and engine
    bleed air valves.
  • Disables the related thrust reverser.
  • Trips the related generator control relay and breaker.
  • Deactivates the related engine driven hydraulic pump
    LOW PRESSURE light.
  • Allows the engine fire warning switch to rotate.