Which option best describes the standby system's role?

Which option best describes the standby system's role?

• A. It backs up the LEDs when hydraulic B fails.
• B. It powers the brakes.
• C. It powers the rudder.
• D. It backs up the flaps.

Answer: (A)

The standby system exists to keep essential cockpit indicators powered when the primary hydraulic system (Hydraulic B) loses pressure. In this case, its role is to back up the LEDs, which are simple, low-power indicators that alert the crew to system status. Keeping these indicators illuminated helps the pilot understand what happened and respond appropriately, even when the main hydraulic supply is gone. The standby system isn’t meant to drive major flight controls or braking actions, which rely on the primary systems, so its function centers on preserving visibility of critical status information through the LEDs.

The standby system exists to keep essential cockpit indicators powered when the primary hydraulic system (Hydraulic B) loses pressure. In this case, its role is to back up the LEDs, which are simple, low-power indicators that alert the crew to system status. Keeping these indicators illuminated helps the pilot understand what happened and respond appropriately, even when the main hydraulic supply is gone. The standby system isn’t meant to drive major flight controls or braking actions, which rely on the primary systems, so its function centers on preserving visibility of critical status information through the LEDs.