Train doors at Front M1 car A3 doors were not proven closed. TC recycled train doors once - ok. Staf f(ORC) checked and confirmed no train doors abnormalities. F ault did not recur at subsequent stations. Train doors at Fr ~~~~~ Train doors at Front M1 car A3 doors wer

L3 

Open Close speed pass: Yes
FOD found: No
Door cycle 20x: Yes
Rubbing marks: No
10/20mm gauge test passed.
Check manifold and actuator for any air leak, none found.
Check EMV for any residue voltage when door close, ok.
Door manual force check ok.
Rectification Actions:
- Postulate FOD dislodged during door cycling. From ER, fault was able to clear after TC cycle door once and did not recur at subsequent stations.
- Replaced 2524 A2 door LHS and RHS door roller.
- Cleaned J-rail and Guide rail.
- Function check door operation satis.
- Perform 10/20mm gauge test satis.
- Door cyclic test 20x satis.
- Door open/close timing satis.
- Door manual force check satis.
- Checked EMV for any residue voltage when door close – ok.

Side finding: Further check found 1524 A3 door slight wobble, replaced LHS and RHS door roller due to roller surface pitting.

Done by: Sanip, Koh, Jack
(18/1/24)