As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON TAXI-OUT #1 HP BLEED FAULT. RAN QRH. FAULT LIGHT EXTINGUISHED WHEN SWITCHED OFF, BUT MEL REQUIRED. RAN NR 1 ENGINE FOR HP VALVE OPS CHECK FAILED. FOUND PRESSURE LIMITER ASSY VALVE SHEARED OFF. REPLACED HP VALVE IAW 36-11-12-04-02. RAN #1 ENG IAW JRH, OPS CHECKED NORMAL. AIRCRAFT OK FOR SERVICE.