A U.S. Air Force non-destructive inspection apprentice assigned to the 1st Maintenance Squadron cleans an optical emission spectrometer component after analyzing an aircraft oil sample at Langley Air Force Base, Va., Sept. 22, 2015. Cleaning the spectrometer occurs after every five oil burnings to ensure proper analysis of metal fragments. (U.S. Air Force photo by Senior Airman Aubrey White/Released)

U.S. Air Force Airman 1st Class Emily Anderson, 1st Maintenance Squadron non-destructive inspection apprentice, prepares an optical emission spectrometer before analyzing aircraft oil at Langley Air Force Base, Va., Sept. 22, 2015. According to its manufacturer, the machine is a compact, rugged, transportable spectrometer designed to analyze wear metals, contaminants and additives in lubricants, hydraulic fluids and coolants. (U.S. Air Force photo by Senior Airman Aubrey White/Released)

A U.S. Air Force non-destructive inspection apprentice assigned to the 1st Maintenance Squadron clears data on an optical emission spectrometer before analyzing aircraft oil at Langley Air Force Base, Va., Sept. 22, 2015. The spectrometer computer analyzes the intensity of light and colors emitted by burning aircraft oil to determine the type of metallic elements contained in the oil. (U.S. Air Force photo by Senior Airman Aubrey White/Released)

A U.S. Air Force non-destructive inspection apprentice assigned to the 1st Maintenance Squadron pours slop oil into a boat before analyzing the oil at Langley Air Force Base, Va., Sept 22, 2015. After the technician pours the oil into the boat, the boat is inserted into an optical emission spectrometer that will burn the oil to measure the intensity of the light it emits, alluding to the type of particles in the oil. (U.S. Air Force photo by Senior Airman Aubrey White/Released)

A U.S. Air Force non-destructive inspection apprentice assigned to the 1st Maintenance Squadron inserts a boat into an optical emission spectrometer before analyzing aircraft oil at Langley Air Force Base, Va., Sept 22, 2015. The analysis of aircraft oil by U.S. Service members follows standards set forth by the Joint Oil Analysis Program. (U.S. Air Force photo by Senior Airman Aubrey White/Released)

A slop oil sample burns inside of an optical emission spectrometer at Langley Air Force Base, Va., Sept. 22, 2015. The spectrometer detects increases in the oil’s wear metal content, ultimately predicting the location of aircraft component failure. (U.S. Air Force photo by Senior Airman Aubrey White/Released)

Equipment used to analyze aircraft oil lies on a work bench at Langley Air Force Base, Va., Sept. 22, 2015. Non-destructive inspection Airmen assigned to the 1st Maintenance Squadron test oil samples for metal fragments which enables them to pinpoint the location of a discrepancy within an aircraft engine. (U.S. Air Force photo by Senior Airman Aubrey White/Released)