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Thu, Mar 11, 2010

SpaceX Aborts Falcon 9 Countdown Prior To Static Fire

Clock Counted To T-2 Before Aborting For Spin Start Problem

SpaceX attempted its first Static Fire for the Falcon 9 launch vehicle Tuesday. The launch sequence was counted down to T-2 seconds, but aborted on spin start. SpaceX said given that this was the first abort event on this pad, the decision was made to scrub for the day to get a good look at the rocket before trying again. They say everything looks "great" at first glance.

Pad preps were completed on time and with good execution. The integrated countdown with the range included holdfire checks, S- band telemetry, C-band, and FTS simulated checks. Also completed were helium, liquid oxygen (LOX), and fuel loads to within tenths of a percent of T-zero conditions. Tanks pressed nominally and all Terminal count, flight software, and ground software abort checks were passed right down to T-2 seconds. We encountered a problem with the spin start system and aborted nominally.

As part of the abort, the pre-valves are closed to isolate the engines from the propellant tank and purge the residual propellants. Brief flames were seen as LOX and kerosene burned off on the pad. The engines did not ignite and there was no engine fire.

The vehicle was detanked and it and the launch pad were safed. Preliminary review shows all other systems required to reach full ignition were within specification. All other pad systems worked nominally. Inspections were complete overnight, and data review and procedure updates will follow. Commodities will be replenished including TEA TEB load, LOX and helium deliveries.

SpaceX says it looks to do the next static fire attempt in three or four days.

FMI: www.spacex.com

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