What should a train operator do if door panel No. 5 malfunctions?

When door panel No. 5 malfunctions, cutting out the door operator is the appropriate action. This response is essential for ensuring the safety of passengers and the efficient operation of the train. By disabling the malfunctioning door operator, the train operator prevents the door from potentially opening while the train is in motion, thus mitigating the risk of accidents or injuries.

This course of action is typically guided by standard operating procedures that prioritize safety. Once the door operator has been cut out, the operator can ensure that the train continues to operate safely until maintenance can address the issue. Meanwhile, other steps may need to be taken, such as notifying maintenance or monitoring the situation to ensure no further complications arise, but the immediate and critical response involves disabling the malfunctioning door.

The options pertaining to replacing the door panel or monitoring it do not address the urgent need for immediate safety precautions, and simply notifying maintenance without taking any action could expose passengers to risks associated with a malfunctioning door.