As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PRIOR TO DESCENT, OBSERVED A LOSS OF HYDRAULIC QUANTITY TO THE STAND PIPE LEVEL FOLLOWED BY A LOSS OF PRESSURE. REMOVED AND REPLACED DAMAGE O-RING ON NR 2 ENGINE HYDRAULIC PUMP PRESSURE LINE FITTING IN ACCORDANCE WITH M/M 20-12-0 PAGE 211. OPERATIONAL CHECK NORMAL IN ACCORDANCE WITH M/M 72-00 PAGE 517. ENGINE STARTING.