What was found
HYD 3 OFF ALERT AFTER GEAR DOWN & LOCKED, RECEIVED HYD 3 FAIL ALERT 58 DEG C MAX PUMP TEMP HYD QTY 2.0 AT BLOCK IN. LEAK APPEARES TO BE AT LT INBD AILERON AREA. FOUND LEAK AT LT INBD AILERON, NR 3 SYS PRESSURE LINE UNION-CHECK VALVE FOUND LOOSE(JUST SNUG) AND 1 OF THE BACKUP RINGS BAD. RESEARCHING PARTS, REF IPC 27-13-07-01, REPLACED 2EA BACKUP RINGS, PN S4929668-115 & 1EA O-RING, PN NAS1611-115 ON LT INBD AILERON ACTUATOR. SERVICED HYD SYS3 IAW MM 12-13-02-3 & AILERONS LEAK CK OPS CK NORMAL IAW MM 27-10-00-2.