As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT 4288 - DURING FLIGHT FROM CHA TO ATL, THE BLUE HYDRAULIC SYSTEM FAILED. AN EMERGENCY WAS DECLARED. AIRCRAFT CONTINUED TO ATL AND LANDED WITHOUT INCIDENT. MAINTENANCE REMOVED AND REPLACED THE BLUE AC HYDRAULIC PUMP. OPERATIONAL CHECKS GOOD. AIRCRAFT RETURNED TO SERVICE. (M)