As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
APPLIED TAKEOFF POWER, LEFT PACK BLEED TRIPPED OFF LIGHT ILLUMINATED. LOW SPEED 10KTS, ABORTED, PULLED OFF RUNWAY. COMPLETED BLEED TRIP OFF QRC. CALLED MAINTENANCE CONTROL, RETURNED TO GATE. ACFT GROUNDED. ACCOMPLISHED FIM 36-10 TASK 811. FOUND THE LT HIGH STAGE VALVE NOT FULLY CLOSED. REPLACED THE HIGH STAGE VALVE IAW AMM 36-11-06. REMOVED & REINSTALLED HIGH STAGE REGULATOR IAW AMM 36-11-07. OPS CHECKED NORMAL.