Aircraft oil is analyzed at Joint Base Langley-Eustis, Va., Dec. 5, 2016. The oil is analyzed using an optical emission spectrometer, which analyzes the burning aircraft oil by the intensity of light and colors emitted. ( Air Force photo by Senior Airman Kimberly Nagle)

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Keywords: 1st, air, base, force, inspection, joint, langley, langley-eustis, maintenance, ndi, nondestructive, squadron