Approximately how long will the auxiliary battery power the items on the auxiliary battery bus?

The auxiliary battery is designed to provide backup power to critical systems when the main electrical system is not functional. In the T-6A, the auxiliary battery connects to the auxiliary battery bus, which typically includes essential components such as the electronic flight instrument system, radios, and other vital avionics systems.

If properly charged and in good condition, the T-6A's auxiliary battery can sustain power to the auxiliary bus items for approximately 30 minutes. This duration allows pilots enough time to manage systems and perform necessary procedures to restore power or safely operate the aircraft in emergencies. Understanding the limitations of the auxiliary battery's power duration is essential for effective risk management and operational planning, especially during flight training and emergencies.

The other answer choices represent durations that exceed the designed capabilities of the auxiliary battery, which could lead to misconceptions about emergency procedures and system management during critical situations.