What should be checked as part of the door unsafe procedure?

The focus of the door unsafe procedure is primarily concerned with ensuring the proper functioning of the door mechanism on an aircraft. Checking the handle position is crucial because it directly indicates whether the door is securely closed or in an unsafe or unlocked state. A door that is not properly secured can lead to serious safety issues during flight, including potential decompression or in-flight emergencies.

While other options may be relevant to overall aircraft safety, they do not specifically pertain to the immediate concerns of the door unsafe procedure. Life raft deployment, fuel levels, and electrical systems are important checks, but they are not part of the standard assessment for door safety. Thus, verifying the handle position is essential to confirm that the door is correctly positioned and secured before flight.