As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PERFORMED IDLE RUN LEAK CHECK ON #2 ENGINE PER B737-900 AMM 71-00-00, SHUT DOWN ENGINE AND OPENED FAN COWLS PER AMM 71-11-02. PERFORMED ENGINE VENTS AND DRAINS INSPECTION PER AMM 71-71-00, FOUND FUEL HEATER-SERVO LEAKING ON TOP CAP. V. BALABAT # 44360. GROUNDED - YES. REMOVED AND REPLACED SERVO FUEL HEATER ON #2 ENGINE REF B737-900 AMM 73-11-07. OPERATIONAL AND LEAK CHECK GOOD. SYSTEM GROUND VERIFICATION SUCCESSFUL.