As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT IN BASE MAINTENANCE: EMERGENCY DECLARED. RETURNED TO CLT ON ACCOUNT OF PRESSURE LOSS IN YELLOW HYDRAULIC SYSTEM. MAINTENANCE ACCOMPLISHED INSPECTION FOR POSSIBLE HYDRAULIC CONTAMINATION/OVERHEAT/ CAVITATION PER AMM 29-00-00-280-006-A01. MAINTENANCE ALSO REPLACED HYDRAULIC LINE GOING TO HYDRAULIC CONTROL UNIT PER IPC 29-13-06 AND REPLACED MAIN SUPPLY FUEL HOSE PER AMM 73-11-11 AND PERFORMED SATISFACTORY OPERATIONAL CHECK.