As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
L & R DUCT PRESSURE SPLIT & ACFT ON GROUND, WITH ENG RUNNING, LT & RT ISOL VALVES CLOSED & BLEED SW ON. PRESSURE EQUAL WHEN N2 INCREASED ABOVE 82 PERCENT. NEED HIGH PRESSURE SHUTOFF VALVE ITEM NR 375. REPLACED NR 2 ENGINE HPSOV. OPS NORMAL.