In the event of a two-way radio communications failure while in IFR conditions, which altitude should be maintained?

In the scenario of a two-way radio communications failure while operating under Instrument Flight Rules (IFR), the correct course of action is to continue at the last assigned altitude or the altitude that was expected in the absence of any assignment from air traffic control. This protocol ensures that pilots maintain a safe and predictable altitude, minimizing the risk of airspace conflicts or controlled flight into terrain.

When communicating with air traffic control (ATC), a specific altitude may have been assigned, or an altitude may have been expected before the communications failure. By continuing at this altitude, the pilot adheres to the established traffic flow and prevents confusion among other aircraft operating in the vicinity. Additionally, this action allows time for potential restoration of communications or for ATC to observe the aircraft's altitude and situation.

Maintaining the last assigned or expected altitude emphasizes adherence to ATC instructions and safety protocols, which are crucial in maintaining safe operations in IFR conditions.