Final answer:
The train operator should not descend to the track to check the train when the brakes fail to release.
Step-by-step explanation:
The train operator need NOT descend to the track to check the train when the brakes fail to release.
Instead, they should attempt other methods to release the brakes, such as troubleshooting the control panel, checking the brake pipe pressure, or consulting the train's operations manual for guidance.
Descending to the track could be dangerous and is not a recommended procedure.