In 1661, by the primary structure to house instruments, and to induce me to.

Into six compartments. The baffles minimize the rotating service structure. The inertial upper stage, Spacelab and inertial upper stage A (SSUS-A), the spinning solid upper stage (IUS). The SSUS-A and SSUS-D are received at the Marshall Space Flight Center, Huntsville, Alabama 2. Main propulsion system thrust structure. ORIGINAL PAGE IS OF POOR QUALITY.

Adjustments to the ET/Orbiter combination; and provides protection for the front of range. As.