As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING PRE FLIGHT WITH START LEVER IN CUTOFF, ENG VALVE CLOSED LIGHT REMAINED ILLUMINATED BRIGHT BLUE #2 ENG (R/H SIDE). GROUNDED - YES. REMOVED #2 ENGINE HMU HPSOV SWITCH REF B737-800 AMM 73-21-09-000-801-F00. INSTALLED NEW HPSOV SWITCH REF AMM 73-21-09-400-801-F00. PERFORMED ACTUATORS TEST PER AMM 71-00-00-700-807 AND EEC BITE CHECK PER AMM 71-00-00-700-808. OPS TEST GOOD.