As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CMH - DIVERSION - FLT 0045 - AFTER CLIMBOUT OF DCA EN ROUTE FOR PHX NOTICED HYDRAULIC POWER TRANSFER UNIT ON ECAM AFTER THRUST REDUCTION. ALSO DISPLAYED ECAM MESSAGE NR 1 ENGINE HYDRAULIC PUMP. DIVERTED TO CMH AS PRECAUTION. MAINTENANCE REMOVED AND REPLACED NR 1 ENGINE HYDRAULIC PUMP PRESSURE SWITCH (1074GK) IAW AMM TASK 29-11-17-000-010, OPERATIONAL AND LEAK CHECK WAS GOOD.