yes it is important 

because some avaition college take admission on the basis of jee manis and boards as well 

if you see private college for avaiation the wont ask but they will say you should belong to science stream 

but i feel you should try nda if you get select in nda you can easily get avaition training instead of applying for private beacause pritvate college have lot of fees around 2 crore but if you see the nda there is not that much fees

Hello Abhishek. 

No, you do not need to give jee main for aviation. Jee Main is only for Btech, to take admission in NIT IIT or IIIT. So you do not need to give JEE Main for Aviation . You just need to have 50% and above in Maths and Physics in your +2. Prepare for your Aviation tests and do not worry about JEE Mains. Hope you get what you desire.

Hope it helps.