Which of the following is NOT a safety measure during door operation?

The answer focuses on identifying a crucial safety violation during door operation. Ignoring signs of malfunction can lead to serious safety risks, as it means overlooking potential hazards that could compromise the safe operation of the aircraft’s doors. Recognizing and responding to malfunctions is essential for ensuring both safety and efficiency during door operations.

The other options pertain to practices that contribute positively to safety. Ensuring the area is clear before operating the door helps prevent accidents involving personnel or equipment. Holding onto the red assist handle provides a secure grip, which is vital for safely operating the door under varying conditions. Looking for passengers before closing the door is essential to ensure that no one is accidentally caught or left behind, enhancing overall safety during the boarding and deplaning process. Each of these measures is designed to promote safety, while ignoring malfunctions directly contradicts that very goal.