To become an Aerospace Propulsion Specialist / Mechanic, you need a 56 Mechanical (M) #ASVAB score. You'll work very specifically with all parts of the aircraft engine. Testing, maintaining, and repairing the engine to ensure the engine is performing properly. Calm your test anxiety by being prepared! Study.com builds you a custom study plan so you can walk into test day prepared. #ASVABprep #USMilitary #AirForce