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RAF MILDENHALL, England -- The nose landing gear hydraulic sub-assembly from a KC-135 Stratotanker is examined under a black light during a fluorescent liquid penetrant inspection July 28, 2011. The black light allows any cracks that may be in the landing gear to be highlighted, showing the exact location of the damage. (U.S. Air Force photo/Senior Airman Ethan Morgan)


Crack detection: An NDI story

RAF MILDENHALL, England -- The nose landing gear hydraulic sub-assembly from a KC-135 Stratotanker is examined under a black light during a fluorescent liquid penetrant inspection July 28, 2011. The black light allows any cracks that may be in the landing gear to be highlighted, showing the exact location of the damage. (U.S. Air Force photo/Senior Airman Ethan Morgan)

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