DURING DT FOUND EMU 515/516 AIR LEAK TES ~~~~~ 3516 CHECKED AND FOUND WFL ACTUATOR MECHNISM AIR LEAK BELOW ELBOW JOINT.REPLACED BOTH.SECURITY/FUNCTION CHECK OK .NO AIR LEAK DETECTED.AIR LEAK TEST 0.48 BAR/5 MIN.MONITOR FOR 1 HOUR OK . BUDIMAN  09.04.2021