Train doors at car Front M1 'A2' door were not proven closed. TC recycled train doors a few times tono avail. Staff(SBW) assisted to push close Front M1 'A2' d oor for train to depart. Staff(SBW) feedback Front M1 'A2' d ~~~~~ L3 Fault unable to be duplicated in depot.

According to reports, TC cycled train doors multiple times to no avail.
Staff feedback that door had a 10cm gap, pushed close for train to
depart.

Fault recurred at next station with EMU506 A-side doors opening, and the
doors were isolated.
In depot, Normalise and checked 1506 A2 door and found no signs of FOD.
Doors were able to cycle multiple times smoothly without any wobbling
nor abnormalities.
suspect FOD dislodged after door isolated in Yishun and fell out on the
way back to depot

Door manifold internals component failure can cause door to be
intermittently unable to close.
Checked and found no leaks and no residual voltage at EMV. Changed out
manifold preventively.