TEA-TEB (triethylaluminum-triethylborane) is a chemical used for Falcon 9 rocket ignition. An issue loading it was the cause of the scrub. Now off-loading propellants to safe the vehicle. / #Crew6#NASA#SpaceX#Falcon9#CrewDragon#Endeavour#NewSpace
Until propellants are offloaded, with 30min remaining, the astronauts stay seated in case the escape rockets activate to launch the #CrewDragon a few miles off-shore. They have practiced this. Next launch opportunity 24 hours. / #Crew6#NASA#SpaceX#Falcon9#Endeavour#NewSpace
I've been at #NASA Kennedy Space Center for launch scrubs on Space Shuttle (STS-134 Endeavour) & Falcon 9 (CRS-3 cargo). I've heard some complaints. Remember launches are not for spectators. A safe launch is priority. / #Crew6#SpaceX#Falcon9#CrewDragon#Endeavour#NewSpace
The next launch opportunity is a 24-hour turnaround. But don't expect #NASA to announce the next #Crew6 launch attempt until crews have time to determine what caused tonight's scrub and what it will take to fix. Stay tuned.👀 / #SpaceX#Falcon9#CrewDragon#Endeavour#NewSpace