Final answer:
The upgrade of the 701C engine permits its enhancement in terms of reliability and maintainability, allowing for an increase in time between necessary engine removals for servicing.
Step-by-step explanation:
The upgrade of the 701C engine permits an enhancement of the engine, and its maintainability, by allowing for an increase in time between engine removals. This essentially means that the engine will be more reliable and will require less frequent servicing, which is a significant benefit in terms of both cost and operational efficiency. Upgrades to engines often include design improvements, material enhancements, or technological advancements that lead to better performance and longevity. The increased time between removals indicates that the upgraded engine can run for longer periods before needing to be taken out for overhaul or maintenance, which is often measured in flight hours in the case of aircraft engines or operating hours for industrial engines.