"On-condition" or "time-continued" components satisfy overhaul criteria but are an amalgamation of new and used parts.
To explain......
Subcomponent parts of a parent component may be returned to service during an overhaul, creating an assembly with a mix of new and older parts. This new assembly maintains the same serial number and becomes, in effect, an "on-condition" or "time-continued" component.Time-continued components may satisfy overhaul criteria but have subcomponent parts that have accrued time in service and cycles in operation that may jeopardize their future life expectancy or maintenance schedule. These components may not be capable of operating to their mandated time between overhaul (TBO) again.
