Private Pilot Private Exam

What would you experience during flight if an electrical system failure (both battery and alternator) occurs?

1. Loss of control authority

2. Avionics equipment failure

3. Decreased engine performance

4. Inability to communicate with Air Traffic Control

The correct answer is: Avionics equipment failure

In the scenario of an electrical system failure involving both the battery and alternator, the primary effect experienced during flight would be avionics equipment failure. This is because most modern aircraft require electrical power to operate their avionics systems, which include navigation radios, communication radios, and other electronic instruments. When both the battery and alternator lose power, these critical systems would fail to function, leading to a total loss of electronic navigation and communication capabilities. While the other options may touch on potential consequences of electrical issues, they do not directly capture the immediate impact of a complete electrical system failure. Loss of control authority typically relates to issues with control surfaces or systems, while decreased engine performance isn't directly linked to electrical failures unless ignition or fuel management systems are affected, which isn't the immediate concern. Finally, while the inability to communicate with Air Traffic Control can occur due to avionics failure, it is a consequence of the broad notion of avionics equipment failure rather than a distinct outcome in this situation. Thus, the correct emphasis is on the total loss of avionics functionality.