Somebody please tell me...

[Propforce]

Jim - 29/3/2006  5:05 PM
MRO swapped out Centaurs at L-7 months and almost did the same with the CCB.  

You got me curious now.  What was the reason for swapping out both stages?

[Jim]

Propforce - 31/3/2006  2:45 PM

Jim - 29/3/2006  5:05 PMMRO swapped out Centaurs at L-7 months and almost did the same with the CCB.  

You got me curious now.  What was the reason for swapping out both stages?

Block II avionics wasn't ready so the Centaur was swapped out with one with Block I avionics.  CCB was going to be for the same reason but was decided against.  There was one other CCB issue and I can't recall it yet.