What was found
LH SYNC LOCK REVERSER EXT WITH HIDRAULIC LEAK, DURING TRANSIT CHECK, IT WAS DETECTED A HYDRAULIC LEAK IN THE LEFT ENGINE REVERSER. MAINTENANCE PERSONNEL PERFORMED REVISION, DETECTING HYDRAULIC LEAK IN THE LH ENGINE SYNC LOCK REVERSER EXTERNAL; SO THE LH ENGINE SYNC LOCK REVERSER EXTERNAL PACKING’S P/N NAS1612-6A, S/S, TSN 491, CSN 267, MANUFACTURER BOEING COMPANY WERE REPLACED IAW AMM 78-34-10, TESTED CORRECT.