As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DISCREPANCY: REFERENCE LP177173 ITEM 3:IN FLIGHT- YELLOW HYD QTY DROPPED TO ZERO NEARLY INSTANTANEOUSLY. AFTER PARKING HDY FLUID LEAKED HEAVILY FROM VENT IN AFT PYLON #2 ENGINE. CORRECTIVE ACTION FROM LP177179-2:REMOVED AND REPLACED #2 ENG HYDRAULIC PRESSURE LINES IN PYLON (1) AND (3). AS REQUIRED PER TFU 29-11-00-01B. LEAK CHECK GOOD. NO DEFECTS NOTED AT THIS TIME. TW: F9T10206C DD 10-7-22 AMM 29-13-49-0001400-812-A