B737 Antiskid & Autobrake (Switch & Lights)

A/B A/S
P9 FWD ELECTRONICS

AUTO BRAKE DISARM Light

  • Illuminated (amber) –
    • SPEED BRAKE lever moved to down detent during RTO or landing.
    • Manual brakes applied during RTO or landing.
    • Thrust lever(s) advanced during RTO or landing.
      • Except during the first 3 seconds after touchdown for landing.
    • Landing made with RTO selected.
    • RTO mode selected on the ground.
      • Illuminates for one to two seconds, then extinguishes.
    • A malfunction exists in the automatic braking system.
  • Extinguished –
    • AUTO BRAKE select switch set to OFF.
    • Autobrake armed.

AUTO BRAKE Select Switch

  • OFF – Autobrake system deactivated.
  • 1, 2, 3, or MAX –
    • Selects desired deceleration rate for landing.
    • Switch must be pulled out to select MAX deceleration.
  • RTO – Automatically applies maximum brake pressure when thrust levers are retarded to idle at or above 88 knots.

Antiskid Inoperative (ANTISKID INOP) Light

  • Illuminated (amber) – A system fault is detected by the antiskid monitoring system.
  • Extinguished – Antiskid system operating normally.