Due to lack of complete and comprehensive communication, each services blamed the others for operational failures.

A spokesman said: 'We don't believe it was caused by a normal operational failure.'

A rough estimate of coverage can be made by observing the ratio between operational failures and maintenance actions.

During the first winter, water condensation and other cold weather problems led to one operational failure after another.

Any failed item that is not corrected will induce operational failure.

A symptom is an observation of an operational failure or undesirable condition in the existing design.

There was also the catchall charge of 'operational failure'.

More often, an accident or operational failure occurs as the result of a sequence of causes.

"Systematic and operational failures led to the tragic and sad death of such a beautiful child."

Eighteen operational failures were documented in one such period in May 1998.