If all power is lost, how accurately does the standby attitude indicator display pitch and roll indications?

The standby attitude indicator is designed to provide reliable pitch and roll indications in the event of a power loss. In this scenario, it has been engineered to maintain accuracy for a specified duration, allowing pilots to continue their operations safely even without electronic indicators.

For the correct answer, the standby attitude indicator can maintain pitch and roll indications with an accuracy of 6 degrees for up to 9 minutes. This means that while the primary flight instruments might fail, the standby instruments still provide a fairly precise representation of the aircraft's attitude, which is crucial for maintaining control during critical phases of flight. Knowing that the indicator maintains this level of accuracy for a limited time allows pilots to make informed decisions and execute maneuvers safely until they can restore power or prepare for alternate procedures.

In time-critical situations, the 6-degree accuracy over 9 minutes is significant as it gives enough situational awareness to the pilot to manage the aircraft without relying solely on other systems that may be compromised. This information is vital in emergency situations where preserving control of the aircraft is paramount.