As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING TRAINING FLIGHT, FLIGHT CREW REPORTED LOSS OF GREEN HYDRAULIC SYSTEM. AN EMERGENCY WAS DECLARED AND AIRCRAFT LANDED IN PHX WITHOUT INCIDENT. AIRCRAFT WAS TOWED OFF THE RUNWAY DUE TO THE LOSS OF THE NOSE WHEEL STEERING. THE B-NUT ON THE HYDRAULIC PRESSURE LINE FOR THE RT MLG DOOR UPLOCK WAS FOUND TO BE LOOSE. THE HYDRAULIC LINE WAS RETORQUED AND THE SYSTEM WAS SERVICED.