As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) ON APPROACH THE LANDING GEAR WAS SELECTED DOWN AND THE NOSE GEAR DID NOT FULLY EXTEND. AN EMERGENCY EXTENSION PROCEDURE WAS CARRIED OUT AND THE AIRCRAFT LANDED WITHOUT FURTHER INCIDENT. MAINTENANCE FOUND THAT THE SPLINE COUPLING CONNECTING THE HYDRAULIC POWER PACK MOTOR TO THE PUMP HAD FAILED DUE TO WEAR FROM LACK OF LUBRICATION AND CORROSION.