Hello again (I'm kinda slowly drifting around the internet these days).

Yup, would've been a bad day if both sets of pyros had failed. There's only double redundancy on that stuff, and in this case one whole circuit (made up of eight pyros) didn't fire. The primary circuit of eight did just fine, fortunately. Had both chains failed, the SRBs would've torn themselves up real good and probably would have resulted in loss of vehicle (but not in an explosion - more of a structural failure leading to stack disintegration ala 51L).

I haven't heard of the cause being found yet, but I'm slightly removed from the program now, working on ELV engineering across the river at the Cape.

Drifting away now,

Kim