Stephan Hall, Honeywell test engineer, cleans inside the auxiliary power unit bay of an A-10 Thunderbolt II June 23, 2021, at Hill Air Force Base, Utah. The bay needed to be cleaned prior to placing thermalcouplers to determine temperatures inside the bay during a ground test.

---

Size: 1938px × 1289px
Photo credit: © Operation 2021 / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: -10, 419th, apu, engine, oo-alc, scms, test, thunderbolt