Which rates combine to form the rating of Master Chief Aircraft Maintenanceman (AFCM) at paygrade E-9?

The rating of Master Chief Aircraft Maintenanceman (AFCM) at the paygrade of E-9 is formed by the combination of the ratings AM (Aviation Machinist's Mate), AME (Aviation Maintenance Administrationman), and AD (Aviation Machinist's Mate).

Each of these ratings contributes specific skills and expertise that are crucial for the advanced responsibilities that a Master Chief in this field would have. The AM rating focuses on the maintenance and repair of aircraft engines and mechanical systems, while the AME rating emphasizes knowledge of aviation maintenance administration, ensuring that operations run smoothly and efficiently. The AD rating covers broader aircraft maintenance skills while also emphasizing tools and techniques essential for overall aircraft function.

Combining these three ratings enhances the ability to effectively manage and maintain aircraft, ensuring that they are safe and operational, which is the main focus of the Master Chief Aircraft Maintenanceman. This confirms that the selected answer accurately reflects the necessary combination for achieving the Master Chief level in the aircraft maintenance community in the Navy.