As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LOST LEFT HYDRAULICS SYSTEM QUANTITY AND PRESSURE AFTER TAKEOFF FOUND LEFT SYSTEM PRESSURE MODULE FILTER BROKEN OFF IN PYLON. PER CREW VIA TOMC MGR HYD QTY WENT DOWN TO .03 AND PRESSURE WAS GOOD NEVER WENT TO 0 THE EDP REF AMM 29-11-17-004-001 REMOVED LT PYLON MOUNTED HYD PRESSURE AND CASE DRAIN MODULE FOR INSTALLED PRESSURE HYD MODULE REF AMM 29-11-17-404-027 OP AND LEAK CKS GOOD.