Gas charge cylinder is associated with which two systems?

Gas charge cylinder is associated with which two systems?

• A. APU start motor only
• B. Emergency hydraulic systems only
• C. APU start motor and emergency hydraulic systems
• D. Neither

Answer: (C)

Gas charge cylinders provide stored energy used by two systems that need a rapid, high-energy impulse. First, they power the APU start motor, delivering the initial spin needed to bring the APU up to speed for ignition. Second, they feed the emergency hydraulic system by pressurizing accumulators, giving hydraulic pressure to essential controls if the primary hydraulic system isn’t available. Because both systems rely on a compact, independent energy source to deliver a quick, reliable start or emergency actuation, the gas charge cylinder is associated with both the APU start motor and the emergency hydraulic systems.

Gas charge cylinders provide stored energy used by two systems that need a rapid, high-energy impulse. First, they power the APU start motor, delivering the initial spin needed to bring the APU up to speed for ignition. Second, they feed the emergency hydraulic system by pressurizing accumulators, giving hydraulic pressure to essential controls if the primary hydraulic system isn’t available. Because both systems rely on a compact, independent energy source to deliver a quick, reliable start or emergency actuation, the gas charge cylinder is associated with both the APU start motor and the emergency hydraulic systems.