As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
#2 ENGINE NACELLE HARNESS MW0312 CONNECTION AT HYD DEPRESS VALVE DAMAGED. HARNESS AND VALVE WILL REQUIRE REPLACEMENT. GROUNDED - YES. REMOVED AND REPLACED THE MW0312 HARNESS REF B737-900 AMM 71-51-03/401. ACTUATORS TEST AND EEC TEST PASSED. REPLACED THE ENGINE-DRIVEN HYDRAULIC PUMP DEPRESSURIZATION SOLENOID PER AMM 29-11-400-805-001.