An official website of the United States government
Here's how you know
A .mil website belongs to an official U.S. Department of Defense organization in the United States.
A lock (lock ) or https:// means you’ve safely connected to the .mil website. Share sensitive information only on official, secure websites.

372nd Training Squadron Detachment 21


Optimize aerospace maintenance training to best support the Intelligence, Surveillance and Reconnaissance (ISR) missions of the 9th Reconnaissance Wing.

Train and Inspire Warriors

Make great maintainers and communicators even better

Deliver state-of-the-art maintenance and communication training to DOD warfighters and international partners – anytime, anyplace! 


Provide field training and training support that makes a lasting difference. 


Detachment 21 of the 372d Training Squadron, 982d Training Group, Sheppard Air Force Base, Texas, provides world class aircraft maintenance training to the 9th Reconnaissance Wing and its partners within the ISR community.

Twenty-three instructors from across 12 career fields develop and deliver 37 formal aircraft maintenance courses covering in-depth theory of operation for Mission Ready Airman and advanced troubleshooting on U-2 and RQ-4 aircraft systems, U-2 and T-38 egress systems and aerospace ground equipment.  Det 21 trains approximately 650 students annually and is a Community College of the Air Force-affiliated school.  Det 21 is the only Mission Ready Airman technical training facility for Global Hawks and U-2’s in the Air Force and has 2 on station MTLs that continue the required guidance for pipeline airman attending technical training at our facilities. 


In addition to supporting the 9th Reconnaissance Wing, Detachment 21 also provides world class aircraft maintenance training for other active, reserve and guard units; civilian agencies, and partner nation forces. 



372 TRS/DET 21, 19501 Edison Ave., Suite 400, Beale AFB, CA 95903; telephone: (530) 634-2545, DSN 368-2545 (Detachment Chief: MSgt Randy Thornsberry).  Normal business hours are Monday through Friday 7:30 am to 4:30 pm.