As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ORD - FLT 177 - EN ROUTE JFK-ORD, DURING CRUISE, CENTER HYDRAULIC SYSTEM LOW QTY MESSAGE. ACCOMPLISHED ALTERNATE LANDING GEAR AND ALTERNATE FLAP PROCEDURES AND AIRCRAFT LANDED ORD WITHOUT INCIDENT. SERVICED CENTER HYDRAULIC SYSTEM. ACCOMPLISHED LEAK AND GROUND CHECKED WITH NO DEFECTS FOUND. SYSTEM GROUND CHECKED NROMAL OPERATION. (M)