Aircraft propulsion system specialist with the 509th Aircraft Maintenance Squadron inspect the interior of a B-2 Spirit engine at Whiteman Air Force Base, Mo., July 27, 2017. The inspection was performed to determine the serviceability of the engine before it was installed into a B-2. ( Air Force photo/Staff Sgt. Danielle Quilla)

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Photo credit: © AB Forces News Collection / Alamy / Afripics
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Keywords: -2, 509th, air, aircraft, altitudes, amxs, electrical, environmental, fly, maintenance, mission, pressurization, propulsion, spirit, squadron, system