Engine check ✅ 🔦 . Staff Sgt. William Jones, a crew chief with the 121st Air Refueling Wing, inspects a turbofan on a KC-135 Stratotanker after landing at Rickenbacker Air National Guard Base, Columbus, Ohio. . 📷 by Senior Airman Ivy Thomas . . . #avgeek #tankers #maintenance #maintainer #NationalGuard #AirNationalGuard