"I decided that informing him of the imminent failure would have violated the Prime Directive."

Normally I just replace disks at the first instant they start acting unexpectedly because that's usually an early indicator of imminent failure.

He works on a computer with a hard drive that drones loudly, indicating imminent failure.

Before he could reach the console, a barely perceptible shift alerted him to the imminent failure of the artificial gravity systems.

This may be a limited occurrence or a sign of imminent failure.

Yet the computer had just announced imminent failure of the antimatter-containment fields.

Grant felt the thruster's imminent failure as an increasingly sharp pain.

Those twelve would, Denbahr assured him, take care of all units in danger of imminent failure.

Räikkönen's tyre began showing signs of imminent failure, and the vibrations in the car became increasingly severe.

A red flag is defined as an imminent or actual structural failure that could lead to collapse.