For how many minutes can the standby attitude indicator retain accurate pitch and roll indications after losing all electrical power?

The standby attitude indicator is designed to provide reliable pitch and roll information even in the event of electrical power loss, which is crucial for pilot situational awareness during critical phases of flight. The indicator can maintain its accuracy through its internal gyroscopic systems.

The correct answer is based on the operational specifications of such indicators, which typically can sustain accurate readings for approximately 9 minutes without electrical power. This time frame allows pilots to maintain control and navigate effectively if there is an electrical failure, as they can rely on the standby attitude indicator for short-term guidance. Understanding this operational capability is vital for pilots to ensure they can rely on backup instruments during emergencies.

In the context of the other options, while 5, 6, or 12 minutes are plausible durations, the standby attitude indicator is specifically engineered to provide 9 minutes of accurate indication post electrical failure, ensuring pilots have sufficient time to execute emergency procedures or navigate to safety.