What happens if an IFR aircraft's clearance limit is not at the approach start?

When an IFR aircraft reaches its clearance limit, the standard procedure involves adhering to the expect-further-clearance (EFC) time provided by Air Traffic Control (ATC). If the clearance limit is not at the start of an approach, the aircraft is expected to hold its position and maintain the clearance limit altitude until the EFC time is reached. This ensures that the aircraft does not inadvertently enter an area that could conflict with other traffic or violate airspace regulations.

Once the EFC time arrives, the pilot can proceed as instructed by ATC, which typically involves continuing the flight to the next waypoint if further instructions have been provided. This is a crucial part of maintaining safe separation between aircraft in busy airspace and facilitating efficient traffic flow.

While communicating with ATC for new clearance, maintaining altitude, or descending could seem reasonable options, they might not align strictly with established procedures for IFR clearances unless explicitly directed by ATC. Therefore, following the protocol regarding EFC time and clearance limits is essential for safe operations in the airspace system.