As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
BEFORE FLIGHT, DURING TAXI OUT THE CREW GOT A BLEED SOV AND LT PACK FAIL CAS MESSAGE, THEY CONSULTED WITH MECHANIC BUT WHERE UNABLE TO GET IT TO CLEAR. THE AC RETURNED TO THE GATE. MECHANIC SWAPPED PRESSURE AND HIGH PRESSURE VALVES. WITH NO FURTHER DISCREPANCIES NOTED THE AC WAS RETURNED TO SERVICE. NOTE: AS OF 2/08/05 THIS PROBLEM HAS NOT COME BACK. (K)