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

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

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