What was found
ON DESCENT LT AND RT "HYD LOW FLOW" ANNUNCIATORS START FLICKERING THEN WENT FULLY ON. EXTENDED LANDING GEAR BUT ONLY LT MAIN WENT DOWN AND LOCKED. BLEW THE LANDING GEAR BLOWDOWN BOTTLE, HEARD THE BOTTLE BLOW BUT HAD NO FURTHER DOWN AND LOCKED INDICATION. AFTER AIRCRAFT RECOVERY, PUT ON JACKS IN HANGER, CONNECTED HYDRAULIC MULE TO AIRCRAFT. STARTED WITH PRESSURE BACKED OFF AND STEADILY INCREASED PRESSURE TO 500PSI. AT 500PSI NOTED HYDRAULIC LINE P/N 5727002-88 LEAKING FROM A PIN HOLE AND ALSO NOSE LANDING GEAR UPLOCK ACTUATOR SHAFT SEAL LEAKING. SYSTEM PRESSURE IS 1750PSI.