Hello Bibek,

To become a flight engineer in India you must follow the following steps

You should first complete your 10+2 level education with a minimum of 60% marks aggregate in science stream (physics, chemistry and mathematics)

After 12th, you must pursue your Bachelors degree in Mechanical /Electrical /Aeronautical engineering with a minimum of 60% marks aggregate

After your graduation (BE/B.Tech) you must enroll in a recognized aviation institute and obtain a flight engineer certificate. To qualify for this certificate you must be of 21 years old (minimum) and also have done a 2 year long course in aircraft and engine maintenance or 3 or more years worth of experience in the field of aviation.

Also obtain medical fitness certificate and certificate regarding eye sight.

Candidates are also required to qualify in in-flight examinations regarding normal as well as emergency tasks.

Hope this helps and Good luck