What is another valid method to test the anti-skid system besides the self-test in the control unit?

• A. No test; only visual inspection.
• B. It is tested during the originating check by cycling the Anti-Skid switch.
• C. Tested by performing a high-speed taxi with ABS engaged.
• D. Tested by applying brake pressure on the ground.

Answer: (B)

Testing anti-skid beyond the control unit’s self-test is about confirming the system works when commanded in a normal maintenance scenario. During the originating check, cycling the Anti-Skid switch triggers a functional test of the anti-skid system, letting you verify that the control unit properly accepts the command, the brake modulator responds by applying and releasing pressure, and the system returns to normal operation. This is a controlled, approved way to verify operation beyond just the self-test.

Visual inspection alone can’t reveal electrical, sensor, or hydraulic faults that would prevent anti-skid from functioning. A high-speed taxi with ABS engaged is unsafe and not a standard test procedure. Applying brake pressure on the ground isn’t a targeted test of anti-skid performance and could cause wheel lock or other hazards.

So cycling the Anti-Skid switch during the originating check is the valid method.