As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
UPON ATTEMPT TO RESTORE #2 ENG HIGH STAGE VALVE TO UNLOCKED POSITION PER T/C N8472003 (ENG WATER WASH) HIGH STAGE VALVE STUCK IN LOCKED POSITION NEEDS REPLACEMENT. GROUNDED - YES. REPLACED #2 ENG HIGH STAGE VALVE REF B737-800 AMM 36-11-06 OPS/LEAK CK PASS.