[DRG]

OK........ here's your fix

It's a bit of work but not too much

Go to the save game folder and rename the DAT and CMT of the save game to an empty slot in your scenario folder like this ( for example )

SpMBTScn0550.DAT
SpMBTScn0550.CMT

Then move them to the scenario folder
Open it with Scenhack and use Change to swap the bad helo with an equivalent

Save and you can continue on ( OR..... I think have not tested ) after you have confirmed you have helos again you can rename it back to being a save game and continue as a campaign....maybe