Acoustic cavities. The high-pressure turbopumps are stud-mounted to the.

3-20.— Mechanical subsystems. EXTERNAL SEPARATION FORWARD EXTERNAL TANK UMBILICAL RETRACTOR ACTUATORS MAIN LANDING GEAR VALVES FOUR-CHANNEL SERVOACTUATORS NOSE LANDING GEAR VALVES The main engines during reentry. AFT FUSELAGE/BODY FLAP INTERFACE ROTARY ACTUATOR (TYPICAL) UPPER OBSERVATION WINDOWS TL U FIELOS OF VIEW CAN BE INCREASED BY.