Which rate typically works in the 400 Division?

The 400 Division typically involves the Aviation Machinist's Mate (AD). This division is primarily responsible for the maintenance and repair of aircraft engines and related systems, which aligns with the tasks performed by AD rates. Their duties include working on engines, fuel systems, and other mechanical components vital to aircraft operation.

The other rates, while they may also have roles within aviation maintenance, focus on different areas. Aviation Electronics Technicians (AE), for instance, primarily manage electrical and avionics systems. Aviation Structural Mechanics (AM) deal with airframe structures and maintenance, while Aviation Ordnancemen (AO) focus on munitions and armament systems. Each rate has specialized responsibilities tailored to specific aspects of aviation maintenance, making the Aviation Machinist's Mate the most relevant for the 400 Division.