Can I do Ph.D after doing Bachelor degree in aviation?

Nobody is allowed to do Ph.D. in any subject devoid of Masters degree. No university or institute can allow it.

Dear Pratik, Master degree is compulsory for doing Ph.D. Without a Master degree, you are not eligible for Ph.D.

Dear Pratik! No, In order to do Ph.D. in India. You need to have clear your Master's (and industrial work experience) in that particular feild. Hope this helps. Good Luck.