B737 Speed Brake Lever and Lights

SPD BRK Lever

  • DOWN (detent) – all flight and ground spoilers in faired position.
  • ARMED –
    • automatic speed brake system armed
    • upon touchdown, the SPD BRK lever moves to the UP position, and all flight and ground spoilers extend.
  • FLIGHT DETENT – all flight spoilers are extended to their maximum position for inflight use.
  • UP – all flight and ground spoilers are extended to their maximum position for ground use.

SPEED BRAKE DO NOT ARM Light

  • Light deactivated when SPD BRK lever is in the DOWN position.
  • Illuminated (amber) – indicates a fault within the autospeedbrake system.

SPEED BRAKE ARMED Light

  • Light deactivated when SPD BRK lever is in the DOWN position.
  • Illuminated (green) – indicates valid automatic speed brake system inputs.

SPEEDBRAKES EXTENDED Light

  • Illuminated (amber) –
    • in–flight –
      • SPD BRK lever is beyond the ARMED position, and
      • a thrust lever is above idle for 15 seconds, or
      • a thrust lever is above approximately 40 degrees for 3 seconds.
      • SPD BRK lever is beyond the ARMED position, and
      • TE flaps extended more than flaps 10, or
      • radio altitude less than 800 feet, or
  • on the ground –
    • SPD BRK lever is in the DOWN detent, and
    • ground spoilers are not stowed.
  • Note: On the ground, the SPEEDBRAKES EXTENDED light does not illuminate when hydraulic system A pressure is less than 750 psi.