517/518 During train prep- Found rapid M ~~~~~ 517/518 During train prep, found rapid MR pressure drop when both side saloon doors were in open position.  517/518 found MR pressure dropped rapidly (2 bar/5 mins) when saloon doors were in opened position. Leak test with saloon doors in closed position (0.4 bar/5 mins). Checked leaksge on all door actuators/manifolds & found multiple door manifolds with air leaksge. OPS 20 raisedto follow-up. Door manifolds with air leakage : #1517 - A3 #2517 - B3 #2518 - A1/A2/A3/A4/B4 #1518 - A1/B1/A3/B3/B4 #3518 - B1/A2/A4  Sarma/Kana 44269 To further rectify.  2518 A2/A3, #1518 A3 & #3518 A4 door manifolds replaced. Checked for any air leakage on the above mentioned saloon doors. Function test saloon doors opening/closing operation - OK. OPS 30 raised to follow-up on the remaining locations : #1518 - A1/B1 #3518 - B1/A2/A4  Farid/Haiqal/Koon PL/Salleh 44270 To follow up.  3518 A1/B1/A2 door manifolds replaced. OPS 40 raised to follow-up on the remaining locations : #3518 - A4 #1518 - A1/B1/B3/B4 #2518 - B1  Alan/Lee PT/Shafie    44271 To follow up rectify.  1518 B1 door manifold replaced. Security/function check - OK. OPS 50 raised to follow-up on remaining locations.  Chan SW 44272 To continue rectification.  3518 A4 door manifold replaced. Security/function check - OK. Air leak check - OK. Still O/S : #1518 - A1/B3/B4             #2518 - B1 OPS 60 raised to follow-up.  Chan GF 44272 To continue rectification.  1518 A1/B3/B4 & #2518 B1 remaining manifolds replaced. Function test & leak rate checked - OK. OPS 70 raised to performed pneumatic test.  Sarma/Alan/Anand/AuTK 44273 To Check U/F & Side For Any Abnormalities.  517/518 performed air leak test (0.3 bar/5 mins). Underframe & side checked for any air leaks & found no air leakage. Checked - OK. OPS 80 raised to follow the last train & to include opening of train doors during M/L testing.                          3517                 3518 Cut-in  :               8.6 bar              8.45 bar Cut-out :              10.4 bar             10.45 bar Charging Rate :       1 min 20 sec         1 min 20 sec Air Leak      :       0.3 bar/5 min        0.3 bar/5 min  Kamarul/Ridzuwan/Au TK 44273 Emu 517/518 - To perform M/L test.  517/518 performed M/L test from UPD-JKN-UPD. No abnormalities found & train performance - OK. No sign of air leakage during saloon doors operation. All saloon doors opening/closing operation - OK. No abnormalities found & function test - OK.  Hanafi 44274