As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DUCT PRESSURE SPLIT RIGHT SIDE 12 PSI @ 33K FEET LEFT 45 PSI @ 33K.INITIATED MIG 2C - 40-0027039. GROUNDED - YES. REPLACED #2 ENG 390 DEGREE PRECOOLER CONTROL VALVE SENSOR IAW B737-800 AMM 36-12-03. IDLE RUN #2 ENG SHOWS NO DUCT SPLIT AND HIGH POWER RUN OPS NORMAL. GROUND VERIFICATION COMPLETE.