I started my current campaign (Rolling Fire) using RP3 (it is RP4 now). 35th FS was based at Haemi when it was attacked by Tu-16s which dropped a whole ****load of bombs which took out one of the two runways. In fact I was ingressing on a sortie when this happened.

The funny thing is that the runway when "destroyed" did not show up at all. It was just the two ends of the runway - in the middle it was just a grass/earth patch. This persisted until it got repaired - then it was back to its pristine condition, no craters or dark patches or anything. It was like as if nothing had happened. I could take off and land from the supposedly repaired runway, too.

<shrug>

Though, as you can see, it's a serious debug-style command, and it will fix EVERYTHING. Bridges, buildings, radars... And the enemy airfields too. Also I dare to guess that since this a forceful command line option, it will not fix the runways with "repair patches" but totally renew them. A guess.

My understanding is that it will not repair units. So planes and SAM batallions are still down.