How is the Anti-Skid test performed?

• A. The ASCU has a built-in test function; The Anti-Skid is tested by cycling the ANTI-SKID switch during the originating check
• B. The Anti-Skid test is performed only by cycling the ANTI-SKID switch
• C. The Anti-Skid test is performed by the hydraulics test function
• D. There is no Anti-Skid test

Answer: (A)

The Anti-Skid test relies on the ASCU’s built‑in self-test, which is triggered by cycling the ANTI-SKID switch during the originating (preflight) check. This self-test exercises the anti-skid circuitry, wheel‑speed sensors, and the actuators, confirming the system can read speeds and modulate brake pressure as intended. The hydraulics test checks hydraulic circuits, but it doesn’t verify the anti-skid logic on its own, and there is indeed an anti-skid test performed. Cycling the switch during the originating check is the procedure that initiates the proper diagnostic sequence to validate the anti-skid system before flight.