Here is the full list of all 37 Aviator - there are Bush Pilot achievements.
Complete at least 10 missions
Fail at least 10 missions
Successfully complete at least 10 missions
Successfully complete at least 10 missions with the LO 55
Successfully complete at least 10 missions with the CB 34
Successfully complete at least 10 missions with the UY 1200
Successfully complete at least 10 missions with the CM 800
Successfully complete at least 10 photography missions
Successfully complete at least 25 photography missions
Successfully complete at least 10 medical missions
Successfully complete at least 25 medical missions
Successfully complete at least 50 medical missions
Successfully complete at least 10 dropping missions
Successfully complete at least 25 dropping missions
Successfully complete at least 10 shooting missions
Successfully complete at least 25 shooting missions
Successfully complete at least 40 shooting missions
Successfully complete at least 10 find object missions
Successfully complete at least 25 find object missions
Successfully complete at least 10 find person missions
Successfully complete at least 25 find person missions
Successfully complete at least 25 find transport missions
Successfully complete at least 10 fire missions
Successfully complete at least 25 fire missions
Fail at least 10 fire missions
Complete 10 flights without a crash
Complete 25 flights without a crash
Complete 50 flights without a crash
Own all aircrafts
Fully extend one aircraft
Perform at least 10 aircraft repairs
Perform at least 25 aircraft repairs
Finish the campaign as far as report 40
Earn 100.000$
Earn 1.000.000$
Earn 3.000.000$