As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT 645 - PHL - ON DESCENT, LOSS OF -A- SYSTEM HYDRAULIC FLUID PRESSURE. PILOT DECLARED AN EMERGENCY LANDING AND LANDED PHL SAFELY. REMOVED AND REPLACED PACKING ON -A- SYSTEM MODULE PACK AND SERVICED -A- SYSTEM WITH FLUID. SYSTEM CHECK NORMAL. (M)