Final answer:
When communication is lost while leaving a clearance limit that is a fix from which an approach begins, pilots should continue flying at the last assigned altitude and maintain the last assigned heading. If no other instructions are given, they should fly the planned route and procedure as filed.
Step-by-step explanation:
When communication is lost while leaving a clearance limit that is a fix from which an approach begins, pilots should follow specific procedures to ensure safety.
The first step is to continue flying at the last assigned altitude and maintain the last assigned heading.
If no other instructions are given, the pilot should fly the planned route and procedure as filed, which includes following any published instrument approach procedure for the intended destination airport.