But he didn't believe there had been any mechanical failure.

To begin with, at least, it would be put down to mechanical failure.

He said the only other possible cause appeared to be mechanical failure.

State of the art, too - never had a mechanical failure.

He was running well until a mechanical failure dropped him to 36th.

But safety board officials said again today that they thought mechanical failure was most likely.

Because a mechanical failure suggests that people weren't doing their job.

Police say mechanical failure has not yet been ruled out.

There was no evidence of mechanical failure on the train.

And if a mechanical failure didn't stop them, lack of fuel would.

Nor have they been able to prove any other theory of a mechanical failure.

According to official reports at the time, the crash was the result of mechanical failure.

The mechanical failure rate on air vehicles is extremely low.

The theme of the day was again mechanical failures, which took out 14 cars.

For example, these may not cover anything other than mechanical failure from normal usage.

A number of possible causes are being investigated, including mechanical failure.

Officials said they were looking into a number of possible causes for the crash, including a mechanical failure.

In such circumstances, there was mechanical failure of the aircraft.

What I don't see is your obvious panic over some mechanical failure.

He then retired on Lap 56 after a mechanical failure in his car.

That seemed to eliminate another possible explanation for a mechanical failure.

"It was a mechanical failure in the brake system," he said.

The bus is being examined for mechanical failures, he said.

The mechanical failures were not caused by an enemy attack, officials said.

Two previous leaders retired from the race due to mechanical failures.