As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
INSPECTION TYPE:N/A COMPLETE LOSS OF HYD QTY IN FLIGHT, ON SYSTEM NR 4. NOTE: RESERVOIR NR 4 INDICATED 1 GALLON. FOUND RIGHT MAIN GEAR DOWNLOCK ACTUATOR FWD HOSE NEAR UPPER FITTING AT SWIVEL LEAKING. REMOVED AND REPLACED HOSE ASSY, SERVICED NR 4 HYD QTY PRESSURIZED & OPERATED SYSTEM REF MM 32- 32-15. NO LEAKS NOTED. RAN NR 4 ENG HYD PUMP & ADP OK.