As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHILE ACCOMPLISHING TROUBLESHOOTING FOR L/H PACK, DISCREET FOR R/H PACK SHOWED "ON" WHEN SHOULD HAVE SHOWN "OFF.". GROUNDED - YES. REMOVED & REPLACED FLOW CONTROL VALVE ON R/H PACK REF B737-900 AMM 21-51-01. OPS CHECK GOOD. ETOPS GROUND VERIFICATION PASSED.