If hydraulic system B fails, is there a backup for the LEDs?

• A. No backup exists.
• B. Yes, on the A hydraulic system.
• C. Yes, on the standby system.
• D. Yes, on the B system.

Answer: (C)

Redundancy is built into the hydraulic system design so critical indicators stay powered even if one system fails. The standby hydraulic system is an independent, dedicated source that keeps essential indicators—like the LEDs—operational when the main B system isn’t available. If hydraulic system B fails, the standby system takes over to power the LEDs, preserving visibility of system status and enabling safe decision-making. The standby path is chosen specifically because it is isolated from the primary systems to avoid a single failure taking down both the indicators and the main hydraulics.