T-9 minutes and counting

Terwijl ze in Florida de volgende punten afhandelen, kunt u ondertussen afstemmen op NASA TV.

• Start automatic ground launch sequencer
  
• Retract orbiter access arm (T-7 minutes, 30 seconds)
  
• Start auxiliary power units (T-5 minutes)
  
• Arm solid rocket booster range safety safe and arm devices (T-5 minutes)
  
• Start main engine gimbal profile test (T-3 minutes, 55 seconds)
  
• Retract gaseous oxygen vent arm, or 'Beanie Cap" (T-2 minutes, 55 seconds)
  
• Crew members close and lock their visors (T-2 minutes)
  
• Orbiter transfers from ground to internal power (T-50 seconds)
  
• Ground launch sequencer is go for auto sequence start (T-31 seconds)
  
• Activate launch pad sound suppression system (T-16 seconds)
  
• Activate main engine hydrogen burnoff system (T-10 seconds)
  
• Main engine start (T-6.6 seconds)