As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: FLIGHT CREW REPORTED A GREEN HYDRAULIC RESERVOIR LOW LEVEL FAULT MESSAGE, AN EMERGENCY WAS DECLARED. THE AIRCRAFT LANDED SAFELY AND WAS TOWED TO THE GATE. MAINTENANCE FOUND THE NOSE WHEEL STEERING CYLINDER LEAKING AND REPLACED IT IAW AMM 32-51-42-400-001C. A SATISFACTORY LEAK AND OPS CHECK WAS ACCOMPLISHED.