As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
COMPLETE LOSS OF GREEN SYSTEM HYD QUANTITY. PERFORMED ABNORMAL CHECKLIST. RETURNED TO AIRPORT, PERFORMED MANUAL GEAR EXTENSION. LANDING NORMAL. MAINTENANCE FOUND JAMNUT LOOSE ON GREEN PRESSURE MANIFOLD. TORQUED NUT AND LEAK CHECK GOOD I/A/W A300 MM 20-21-12. SERVICED HYD SYSTEM IAW A300 MM 12-12-21. RESTORED LANDING GEAR ACTUATING SYSTEM TO NORMAL IAW A300 MM 32-30-00. AIRCRAFT RETURNED TO SERVICE.