How long do Main Batteries last when manually placed in Emergency Bus Operations?

How long do Main Batteries last when manually placed in Emergency Bus Operations?

• A. Approximately 30 minutes
• B. Approximately 60 minutes
• C. Approximately 90 minutes
• D. Approximately 120 minutes

Answer: (B)

This is about how long the main battery can power the Emergency Bus when you manually place it on that bus. When the main battery is connected to the Emergency Bus, the electrical load is limited to essential systems, and the energy is conserved to provide power for about one hour. The design uses this roughly 60-minute window to give you time to manage the emergency, switch to any available alternate power, and complete necessary checks or adjustments before landing. A shorter duration, like thirty minutes, wouldn’t give you enough time to address the situation, while longer durations (ninety or more minutes) aren’t supported by the battery capacity in this setup. So the expected endurance is approximately 60 minutes.

This is about how long the main battery can power the Emergency Bus when you manually place it on that bus. When the main battery is connected to the Emergency Bus, the electrical load is limited to essential systems, and the energy is conserved to provide power for about one hour. The design uses this roughly 60-minute window to give you time to manage the emergency, switch to any available alternate power, and complete necessary checks or adjustments before landing. A shorter duration, like thirty minutes, wouldn’t give you enough time to address the situation, while longer durations (ninety or more minutes) aren’t supported by the battery capacity in this setup. So the expected endurance is approximately 60 minutes.