What statement is true about the APU's fuel source?

What statement is true about the APU's fuel source?

• A. The APU receives fuel from the Left Collector Tank.
• B. The APU receives fuel from the Right Collector Tank.
• C. The APU receives fuel from the Center Tank.
• D. The APU receives fuel from the Main Tank.

Answer: (A)

The APU is designed to run on its own dedicated fuel source so it can start and operate even while the engines are drawing fuel from other tanks. On the CRJ-550, that source is the Left Collector Tank, fed by a dedicated APU fuel pump. This setup keeps the APU’s fuel supply isolated from the engines’ fuel demand and from the other tanks, reducing the risk of fuel starvation or imbalance during APU operation or engine crossfeed. The other tanks aren’t used for the APU feed in normal operation because they’re designated for engine fuel needs or overall system balance, not for the APU.

The APU is designed to run on its own dedicated fuel source so it can start and operate even while the engines are drawing fuel from other tanks. On the CRJ-550, that source is the Left Collector Tank, fed by a dedicated APU fuel pump. This setup keeps the APU’s fuel supply isolated from the engines’ fuel demand and from the other tanks, reducing the risk of fuel starvation or imbalance during APU operation or engine crossfeed. The other tanks aren’t used for the APU feed in normal operation because they’re designated for engine fuel needs or overall system balance, not for the APU.