Airman Isiah Echevarria, 361st Training Squadron aircrew flight equipment apprentice course student, practices sewing different knots while making repairs to a parachute at Sheppard Air Force Base, Texas, Dec. 15, 2017. Echevarria is in block six of eight and scheduled to graduate Jan. 12. (U.S. Air Force by Alan R. Quevy)
Students in the 361st Training Squadron aerospace ground equipment course learn about the gas turbine engine process while in operation at Sheppard Air Force Base, Texas, Dec. 15, 2017. The class is in block eight of 15 and scheduled to graduate Feb. 20. (U.S. Air Force photo by Alan R. Quevy)
Airmen and Seamen in the 366th Training Squadron heating ventilation and air conditioning apprentice course, compete to disassemble, replace seals and reassemble a boiler pump at Sheppard Air Force Base, Texas, Dec. 12, 2017. Combining different services during training provides the students a real-world perspective of military operations. (U.S. Air Force photo by Alan R. Quevy)
Staff Sgt. Jared Silva, left, and Airman Daniel Graham, 361st Training Squadron aerospace ground equipment apprentice course students, troubleshoot an inoperable air compressor at Sheppard Air Force Base, Texas, Dec. 15, 2017. Silva and Graham are in block 11 of 15 and scheduled to graduate Jan. 22. (U.S. Air Force by Alan R. Quevy)
Airman Gavin Sanders and Seaman Joshua Bryant, 366th Training Squadron heating ventilation and air conditioning apprentice course students check the pilot light during a boiler operational inspection at Sheppard Air Force Base, Texas, Dec. 12, 2017. Sanders and Bryant are in block four and scheduled to graduate Jan. 9. (U.S. Air Force by Alan R. Quevy)
Airman Gabriel Alcantara, 366th Training Squadron student, checks heaters and fans during a boiler operational inspection at Sheppard Air Force Base, Texas, Dec. 12, 2017. Alcantara is in block four of the heating ventilation and air conditioning apprentice course and scheduled to graduate Jan. 9. (U.S. Air Force by Alan R. Quevy)
Airmen Cody Ward, Kevin Chipi and Seaman Colton Clifton, 366th Training Squadron heating ventilation and air conditioning apprentice course students, check a filter during boiler training at Sheppard Air Force Base, Texas, Dec. 12, 2017. The students are in block four and scheduled to graduate Jan. 9. (U.S. Air Force photo by Alan R. Quevy)
Airman Wilhelm Connor, 361st Training Squadron aerospace ground equipment apprentice course student, uses a multi-meter to check the voltage on an air conditioner during maintenance training at Sheppard Air Force Base, Texas, Dec. 15, 2017. Conner is in block 11 of 15 and is scheduled to graduate Jan. 22. (U.S. Air Force by Alan R. Quevy)
Airman Alonzo Kendall, Airman 1st Class Brandon Garcia and Senior Airman Kathryn Beirne, 361st Training Squadron aerospace ground equipment apprentice course students, perform an initial inspection on a new generation heater at Sheppard Air Force Base, Texas, Dec. 15, 2017. The Airmen are in block are in block five of 15 and scheduled to graduate March 12. (U.S. Air Force by Alan R. Quevy)
Airman Seth Lanham, 361st Training Squadron aerospace ground equipment apprentice course student, troubleshoots a hydraulic test stand that will not start at Sheppard Air Force Base, Texas, Dec. 15, 2017. Lanham is in block 11 of 15 and is scheduled to graduate Jan. 22. (U.S. Air Force by Alan R. Quevy)
Airmen and Seamen from the 366th Training Squadron heating ventilation and air conditioning apprentice course students, purge air out of the boiler system during an operational inspection at Sheppard Air Force Base, Texas, Dec. 12, 2017. The release of steam ensures all air has been purged from the system and the boiler is fully functional. (U.S. Air Force by Alan R. Quevy)
Tech Sgt. Jose Solis Aguilar, 366th Training Squadron instructor, explains the importance of conducting a safety inspection before starting the boiler to his heating ventilation and air conditioning apprentice course students at Sheppard Air Force Base, Texas, Dec. 12, 2017. Solis Aguilar’s class is block four and scheduled to graduate Jan. 9. (U.S. Air Force by Alan R. Quevy)
Seaman Apprentice Garner Blake, 366th Training Squadron electrical apprentice course student, wires and installs an exterior lighting circuit used for traffic control lights and street lights during training at Sheppard Air Force Base, Texas, Dec. 12, 2017. Blake is in block four and scheduled to graduate Feb. 7. (U.S. Air Force photo by Alan R. Quevy)
Seaman Apprentice Anthony Cook, 366th Training Squadron electrical apprentice course student, wires an exterior lighting circuit used for traffic control lights and street lights during training at Sheppard Air Force Base, Texas, Dec. 12, 2017. Cook is in block four and scheduled to graduate Feb. 7. (U.S. Air Force photo by Alan R. Quevy)
Seaman Apprentice Brandon McGuire, 366th Training Squadron electrical apprentice course student, wires and installs an exterior lighting circuit used for traffic contro lightsl and street lights during training at Sheppard Air Force Base, Texas, Dec. 12, 2017. McGuire is in block four and scheduled to graduate Feb. 7. (U.S. Air Force photo by Alan R. Quevy)
Seaman Recruit Nolan MacDowell, 366th Training Squadron electrical apprentice course student, wires, installs, and troubleshoots an exterior lighting circuit used for traffic control lights and street lights during training at Sheppard Air Force Base, Texas, Dec. 12, 2017. MacDowell is in block four and scheduled to graduate Feb. 7. (U.S. Air Force photo by Alan R. Quevy)