Here is the full list of all 11 Air Missions: HIND achievements.
Kill 100 ground soldiers in any mode
Shoot down helicopter with an S-5 Rocket on distance greater than 100 meters in singleplayer
Capture the city in central Asia (Campaign mode)
Destroy at least 5 helicopters in Mi-8 helicopter battle (instant action)
Play and complete at least one co-op mission
Shoot down 10 helicopter in deathmatch or team-deathmatch
Destroy tank with AT-2 guided rocket
Complete Instant Action - Clear City during night
Evacuate the soldiers from the rooftop in Eastern Europe (Campaign mode)
Complete all campaign missions
Complete all Instant action missions