How long will the standby attitude indicator supply accurate information after total electrical failure?

The standby attitude indicator in the T-6 provides critical flight information and is designed with a separate power source to maintain functionality during an electrical failure. After a total electrical failure, this indicator can continue to supply accurate attitude information for approximately 9 minutes.

This duration is significant for pilots, as it allows them a crucial window to manage an emergency or navigate to safety without relying solely on primary flight instruments, which may become inoperative. The design consideration of the standby attitude indicator taking into account a backup timeframe demonstrates the importance of redundancy in aircraft systems, ensuring that pilots can maintain situational awareness even in adverse conditions.