The obstructions.

Figure 3-20.— Mechanical subsystems. EXTERNAL SEPARATION FORWARD EXTERNAL TANK UMBILICAL RETRACTOR ACTUATORS MAIN LANDING GEAR STRUT ACTUATOR MAIN LANDING GEAR SECONDARY EGRESS ROUTE EJECTION OVERHEAD ESCAPE ESCAPE PANEL JETTISON CONSOLE ESCAPE PANEL JETTISON CONSOLE ESCAPE PANEL PANELS SS OPENING (TYPICAL) ) DESCENT ИМЕ | 15 m (50 FT) THERMAL DESCENT ESCAPE PANEL JETTISON CONSOLE ESCAPE PANEL JETTISON EXTERNAL T-HANDLE.