Final answer:
Overhauled maintenance is a maintenance task that is beyond a unit's capabilities and is performed by another unit or supporting maintenance activity.
Step-by-step explanation:
The term you are referring to is overhauled maintenance, which is a maintenance task that falls under the responsibility of a specific unit but cannot be performed by them due to various limitations or unusual circumstances. In such cases, the task is outsourced to another unit or a supporting maintenance activity.
For example, in the aviation industry, aircraft overhauls are often carried out by specialty maintenance facilities rather than the airline's own maintenance team. This is because overhauling an aircraft requires highly specialized knowledge and equipment that may not be available within the airline's capabilities.
Overall, overhauled maintenance allows units to maximize their efficiency by delegating complex or challenging tasks to external specialists.