AAA 452.

RADIATOR PANELS PAYLOAD BAY DOOR N FORWARD PANELS RADIATE AFT RADIATOR PANELS PAYLOAD BAY DOORS ACTUATION AND LATCHING DEPLOYABLE RADIATORS ACTUATION AND LATCHING Figure 3-20.— Mechanical subsystems. EXTERNAL SEPARATION FORWARD EXTERNAL TANK UMBILICAL PLATE Figure 2-17.—Space Shuttle Extemal Tank.