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Ref : S10445

Theme : Testings - Satellites - Probes - Rockets  (2314 images)

Title : Technicians at Pad 39B carry a new Auxiliary Power Unit (APU) to be installed

Caption :

(04/14/1990) -- Technicians at Pad 39-B carry a new Auxiliary Power Unit (APU) to be installed in the orbiter Discovery. It will replace APU #1 that failed during the STS-31 launch attempt on April 10.