As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHILE ACCOMPLISHING LOCK OUT PROCEDURE ON HIGH STAGE VALVE ON #2 ENGINE, FOUND HIGH STAGE VALVE RATCHETING NOT CLOSING SMOOTHLY. GROUNDED - YES. REMOVED AND REPLACED HIGH STAGE VALVE INSTALLATION REF AMM 36-11-06. OPS CHECK AND LEAK CHECK GOOD.