Repair & Explosives.

[Shroom420]

Repair badge isn't hard at all. Don't bother with the whole tank method or stat whoring method by the cheater above, here's a great way to get the badge:

Play a medium sized map like Songhua Stalemate and spawn near the blackhawk with an engy kit. Make sure there are a good number of people already aboard so that you don't end up on gunner. You should then be onboard and able to switch to your wrench. If you have a good crew(especially a good pilot), you can stay in the air for a very long time, and using your handy dandy wrench you can repair the chopper while you fly(very realistic!...sigh). Make sure to move the repair icon around if you find that you aren't healing any damage. I did this and got about 22 repair points in a single round and had about 77 total points all in one go. The biggest trick is finding a good crew.

I got mine in a heli with only me and the pilot my friend was flying knowing he is a good pilot. use the F4 F5 F6 buttons to get in the back sections. F2 and F3 are the gunner seats and if the pilot dies F1 is the button. I hate it when im flying and i die and i see my crew just siting there not noticed and fall to there death.