As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LANDED UNDER AMBER ALERT DUE TO LOSS OF GREEN HYDRAULIC ENGINE PUMP. [SUP 05-29-07] REPLACED ENG NR 1 HYDRAULIC PUMP AND CASE DRAIN FILTER. HYDRAULIC PUMP WAS OVERHAULED, BUT NOTHING WAS FOUND TO BE OUT OF SPEC. SEVERAL FLIGHTS LATER, THE ERROR MESSAGE REOCCURRED. FURTHER FAULT TRACING DETERMINED THAT THE GREEN HYDRAULIC SYSTEM PRESSURE SWITCH WAS FAULTY AND REPLACED.