Well, there are several ways to get into aircraft maintenance engineering. Most of the colleges have there own selection process, they accept different exam scores. One of the best ways is JEE MAINS. most of the engineering colleges take the JEE MAINS score. So I'll suggest selecting a college first.

There are many which can get you admission in aircraft maintenance engineering, for example SSAT, JEE Main, Karnataka PGCET, GATE, HITSEEE, AP EAMCET, RPET, UPESEAT, etc.

You can check a college on basis of your score of the exam you will face through this tool

https://engineering.careers360.com/jee-main-college-predictor?icn=QnA&ici=qna_answer

FEEL to ask for any queries. GOOD LUCK!!