Would a second engine greatly increase carrier-aircraft downtime?

Would a second engine greatly increase aircraft downtime and the personnel needed to service it?

Existing naval maintenance and spare-engine exchange practices could limit downtime, but the additional engine requirement remains.

A second engine raises concerns about downtime and the number of mechanics required. Alex Clarke argues that naval aircraft already received extensive maintenance and that carriers could carry spare engines to exchange for units removed from airframes. That practice supports an argument against assuming a proportionate increase in downtime. The objection remains that a twin-engine fleet needs twice as many engines per airframe, and the exchange does not quantify the extra personnel or stores required.