RSCR 1 LOW caution illuminates when?

• A. When the Reservoir is Full
• B. When There is 60% Fluid Remaining in the Reservoir
• C. When The APU Accum Has Leak
• D. When The Reservoir Has 10% Fluid Remaining

Answer: (B)

The RSCR 1 LOW warning is tied to how much fluid remains in reservoir 1. It lights when the reservoir has 60% of its capacity remaining, serving as an early alert that you should monitor and plan for replenishment before the level drops further. This mid-range threshold gives crews advance notice to ensure there’s enough fluid for continued operation without risking depletion.

If the reservoir were full, there’d be no low warning because there’s plenty of fluid. A leak in the APU accumulator would trigger a different indication related to that subsystem, not this reservoir-level cue. A figure like 10% remaining would typically correspond to a more urgent, later-stage warning or a distinct alert.