unscheduled maintenance


unscheduled maintenance

[¦ən′skej·əld ′mānt·ən·əns] (industrial engineering) Those unpredictable maintenance requirements that had not been previously planned or programmed but require prompt attention and must be added to, integrated with, or substituted for previously scheduled workloads.

unscheduled maintenance

The maintenance performed on an aircraft that was not planned and arose as a result of problems discovered in the course of normal operation.