Once the Orbiter checkout with any payloads installed in the OPF is completed, it is towed to the VAB where it is mated with the ET and the SRBs on the MLP.
The Orbiter connections to the MLP through the Tail Service Mast are then verified as well as Orbiter to ET and SRB interfaces. Th crawler is positioned under the MLP, lifts it and carries the MLP, SRB, ET, and Orbiter on its three mile trip to the launch pad. Once there, the MLP is placed "hard-down" and connections to the launch pad are verified.
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__________________________________________________________________Last Updated Friday September 1 14:40:35 EDT 1995 Tom Nguyen (firstname.lastname@example.org) Ernest Cody (email@example.com) Jim Dumoulin (firstname.lastname@example.org)