As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AT CRUISING ALTITUDE, FLIGHT CREW NOTICED A DROP IN MAIN HYDRAULIC PRESSURE. WHEN CREW START TO APPROACH THE HYDRAULIC WAS PRESSURE LOW. LANDING GEAR WERE SELECTED DOWN AND ALL PRESSURE WAS LOST. MAINTENANCE FOUND THE B-FITTING LOOSE ON THE NOSE LANDING GEAR ACTUATOR HYDRAULIC UPPER PORT. FITTING TIGHTENED, GEAR SWING COMPLETED. NO LEAKS FOUND. REFER TO LR35 IPC 32-31-05 FIG 5 ITEM 140-141.