What is the expected minimum duration of battery power to the battery bus items after a bus tie failure?

• A. 15 minutes
• B. 30 minutes
• C. 45 minutes
• D. 60 minutes

Answer: (B)

The expected minimum duration of battery power to the battery bus items after a bus tie failure is 30 minutes. This duration is based on the design specifications and operational requirements for systems reliant on battery power in the event of a failure in the bus tie.

This time frame ensures that essential electrical components remain operational long enough to allow for safe procedures such as landing, troubleshooting, or transitioning to an alternate source of power. It reflects careful calculations made during the aircraft's design phase to guarantee that critical systems can function adequately in emergency scenarios, ensuring the safety and effectiveness of operations under these circumstances.

The other options reflect longer durations that exceed the specified minimum, but they do not align with the operational capability and design integration of the aircraft's electrical system under a bus tie failure condition. By maintaining a standard of 30 minutes, the aircraft's systems can effectively manage energy consumption while providing necessary reliability for flight operations.