As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT 5490 - STL - DURING CRUISE, HYDRAULIC SYSTEM NR 2 QUANTITY WENT TO ZERO FOLLOWED BY A HYDRAULIC SYSTEM NR 2 FAILURE. MAINTENANCE INSPECTED AND FOUND A LEAKING PRESSURE SWITCH LEAKING. THE SWITCH WAS REMOVED AND REPLACED WITH NO OTHER DEFECTS NOTED DURING TESTS/CHECKS.