At 11:35 Phoenix time, we are 25 minutes away from SpaceX conducting a hot firing of the Falcon 9 launch vehicle, prior to blastoff with the Dragon spacecraft, which is tentatively scheduled for 7 May 2012.
PAO just noted two minutes to polling for go/no go on the static firing. The countdown has proceeded well so far.
Polling: All systems go for static fire at L-minus 20 minutes.
T-minus 15 minutes.
Terminal Count Autosequence has started.
T-minus 8 minutes. Going to internal power.
T-minus 90 seconds.
Holding at T-minus 47 seconds.
Dragon did not start up.
Contingency abort and disabling prop systems.
SpaceX does have the ability to recycle the count and try it again today.
Twitter from @SpaceX: “Reviewing Data”
Recycled to T-minus 13:00. Launch team is reviewing the data.
Lox continues to vent, so a full blown abort has not been declared as yet.
Twitter @SpaceX: “May recycle and try again today, watch for update.”
PAO: “Picking up the clock at T-20 minutes”. The problem was a “limit improperly set” (Overly restrictive redline on second stage engine position).
Twitter @Elon: “Flight computer aborted rocket hold down firing. Anomaly addressed. Cycling systems to countdown .” Included image of the SpaceX launch control room.
Countdown sequence resumed. Now T-minus 15 minutes. Final Readiness Poll again in progress.
Polling complete and launch director says proceed.
Coming up on T-10 minutes. Terminal Count Autosequence has started.
Dragon Internal On sequence is beginning. T-8 minutes. Configuring power for internal handover. Dragon on internal power.
T-2 minutes. Vehicle vents closed, LOX lines are venting at launch duct.
T+3 seconds PAO – “Good static fire. Continue”.
Twitter @Elon: “Woohoo, rocket hold down firing completed and all looks good!!”
We may know the results of the data gathered by tomorrow, and then know if the 7 May launch date for the Dragon mission to the ISS is set.