As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SHIP 3028 - ALT GEAR EXT - LOST THE GREEN HYD SYSTEM QUANTITY ON CLIMB OUT. CREW PERFORMED ALT GEAR EXTENSION AND LANDED UNEVENTFULLY AT DESTINATION. CORRECTIVE ACTION: LOOSE "B" NUT FOUND ON CASE DRAIN LINE AT FILTER HOUSING ABOVE THE ENG-1 HYDRAULIC PUMP. TORQUED B NUT AND LEAK CHECKED OK. REPLACED ENG-1 HYD PUMP AND FILTER.