Environmental protection for circuit outages. Both real-time and.

2 ж” 77074 EXTERNAL TANK UMBILICAL PLATE Figure 2-17.—Space Shuttle Extemal Tank. HYDROGEN TANK PRELAUNCH COOLANT LOOP UMBILICAL SERVICE PANEL (DISCONNECTED — AT T — 2 hr 50 min Function Start retraction of rotating service structure is 31 meters.