What was found
AFTER SHUTDOWN AT THE GATE, ENGINES TO CUTOFF, #1 (LEFT ) ENGINE. "ENG VALVE CLOSED" REMAINS BRIGHT BLUE. GROUNDED - YES. REMOVED AND REPLACED #1 ENGINE HMU HPSOV SWITCH REF B737-800 AMM 73-21-09-000/400-801-F00. OPS CHECK GOOD.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
AFTER SHUTDOWN AT THE GATE, ENGINES TO CUTOFF, #1 (LEFT ) ENGINE. "ENG VALVE CLOSED" REMAINS BRIGHT BLUE. GROUNDED - YES. REMOVED AND REPLACED #1 ENGINE HMU HPSOV SWITCH REF B737-800 AMM 73-21-09-000/400-801-F00. OPS CHECK GOOD.