So now you want the Dark Blue blokes wandering around the battlefield flying Wokkas/Merlins? Seem to me they might need a bit of training up and new support organisations to do that. I can see the case for transferring them to the army, they are after all going to be almost exclusively moving troops/ammo/artillery and supporting the Apache. But the RN, ................!!
As for the idea that you can support the complex electronics and composite structures on something like a GR7/9 by calling on the REME/MASU to whip together a spare for it..... Call out the blacksmith for a new set of shoes?