What was found
HYD Y SYS LO LVL ECAM APPEARED AFTER TAKEOFF. CREW STATED THEY LOST YELLOW SYS ON TAKEOFF. SHUT YELLOW HYD ELECT PUMP OFF IMMEDIATELY. FLT WAS JUST OVER A HOUR. CONFIRMED YELLOW SYS EMPTY ON LOWER SERVICE PANEL QTY GAUGE & ON PANEL. MET ACFT ON TAXIWAY, ACFT HAD ZERO HYD FLUID IN YELLOW SYS. NOSE STEERING & CARGO DOORS INOP. INSTALLED GEAR PINS. INSPECTED ACFT , FOUND HYD LEAK UNDER RT ELEVATOR, ALONG WITH A PUDDLE OF FLUID UNDER RT STAB. ACCOMPLISHED STEP K OF AMM 27-34-51-400-001A. ACCOMPLISHED RII INSPECTION OF AMM 27-34-51-400-001A STEP K. CONTINUE THE FROM STEP (D) TO FINISHED OPS CHECKED GOOD AN NO LEAKS IAW AMM 27-34-51-400-001-A. COMPLETED OPS & LEAK CHECKS. SYSTEM OPS NORMAL & NO LEAKS NOTED IAW AMM27-34-51-400-001-A AND GMM09-25-05.