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So TEA/TEB are used to start the turbine as well as to ignite the engine?
Yes, both have different roles.
So TEA/TEB are used to start the turbine as well as to ignite the engine?
I'm guessing the high pressure helium goes through the gas generator turbine.The valve that didn't actuate is the ground side isolation valve to release ground supplied high pressure helium to start the first stage engine turbopumps spinning at several thousand rpm. Once that happens it generates enough pressure to start the gas generator, which is a small rocket engine that powers the turbopump. There are no vehicle side valves actuated for spin start (just check valves), so it is an all engines or none situation.

Wow, April 12! I hope it really launches on that date. Would be pretty cool for it to launch on the 49th anniversery of Yuri's flight.
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Send them an eMail! :thumbup:
!We have to find a way to get Musk to put a small probe model in the dummy Dragon payload for good luck.
Yes but what happends if something still goes wrong....:embarrassed:
Then I'll be happyYes but what happends if something still goes wrong....:embarrassed: