![](http://www.alamy.com/thumbs/6/FA260FFB-6900-47CD-8127-BD2F2FEF6C32/2GKRXDP.jpg)
Jared Hainsworth (left), A-10 System Program Office, and Stephan Hall, Honeywell test engineer, look inside the auxiliary power unit bay of an A-10 Thunderbolt II June 23, 2021, at Hill Air Force Base, Utah. The engineers were determining where they would be placing thermalcouplers to determine temperatures inside the bay during a ground test.
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Photo credit: © Operation 2021 / Alamy / Afripics
License: Licensed
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Keywords: -10, 419th, apu, engine, oo-alc, scms, test, thunderbolt