What was found
FLT#869, JFK-PUJ. (AIRCRAFT DECLARED AN EMERGENCY AND DIVERTED TO SJU).' HYD Y RSVR LO LVL , LOST FLUID IN FLIGHT; FOUND TO BE LEAKING FROM HP MANIFOLD OF THE YELLOW HYD SYSTEM, REMOVED AND REPLACED YELLOW HYD SYSTEM HP MANIFOLD IAW AMM 29-13-14, OPS CHECK OK LEAK CHECK OK, SERVICED YELLOW HYD SYSTEM REF AMM 12-12-29. A/C OK FOR SVC.'