What does the FLEX ROLLING BLEEDS CLOSED message indicate regarding the APU status?

What does the FLEX ROLLING BLEEDS CLOSED message indicate regarding the APU status?

• A. APU is Off
• B. APU is On
• C. Bleed Valve Open
• D. Bleed Valve Closed

Answer: (B)

The message is about where bleed air is coming from. FLEX and ROLLING bleeds are alternate bleed paths, and when they’re shown as closed, those sources aren’t supplying air. That leaves the APU bleed as the active source, so the APU must be on to provide the necessary bleed air to the system. If the APU were off, you wouldn’t have those bleeds closed as the sole source, and the status would reflect that the bleed sources are different.

The message is about where bleed air is coming from. FLEX and ROLLING bleeds are alternate bleed paths, and when they’re shown as closed, those sources aren’t supplying air. That leaves the APU bleed as the active source, so the APU must be on to provide the necessary bleed air to the system. If the APU were off, you wouldn’t have those bleeds closed as the sole source, and the status would reflect that the bleed sources are different.