What is indicated by the fourth position "X" in the AFSC 2T2X1?

The fourth position "X" in the Air Force Specialty Code (AFSC) 2T2X1 indicates the current skill level of the individual. In this coding system, the skill levels are represented by numbers which signify the developmental levels an Airman can achieve throughout their career. The "X" is used to represent a specific grouping of skill levels, which typically includes the apprentice, journeyman, or craftsman.

In the case of 2T2X1, the “X” signifies that the individual is at the 3-skill level or journeyman level, meaning they have met the qualifications to perform tasks independently and have demonstrated proficiency in their specialty. It provides a clear understanding of the individual's level of experience and capabilities within the air transportation field, allowing for better planning of assignments and career progression for the Airmen.