In the event of lost communication, what altitude should be maintained?

In the event of lost communication, the correct approach is to maintain an altitude that is the highest of the Minimum Enroute Altitude (MEA), the altitude that was expected, or the last assigned altitude from Air Traffic Control (ATC).

The MEA is critical as it ensures that you stay clear of obstacles and can maintain communication with navigation aids. The expected altitude refers to the altitude ATC had planned for you to fly before losing communications, and the last assigned altitude provides additional assurance of safety by keeping you at the last level you were instructed to maintain.

By following this guideline, pilots ensure they are operating within safe parameters and are positioned in the airspace correctly until they can reestablish communication or safely make a descent and landing if necessary. This standard is rooted in the need for safety and situational awareness, providing structure during a potentially stressful situation.