[9][11] Near Dover station, a defective axle box dropped on the tracks, causing the bogie frame to be dislodged from the third car of the six-car train.

[10][14] The Land Transport Authority (LTA) later announced at 2:45 pm that there would not be train services between Boon Lay and Queenstown for the rest of that day because of the extensive damage.

[16][17] Police officers, LTA ground staff, and personnel from the bridging bus operators were deployed to manage the crowds at the affected stations.

[20] The next day, SMRT and LTA reported that their engineers made "significant progress" with the maintenance as well as completion of heavy rail delivery work.

[22] In a joint statement by SMRT and LTA on 29 September, it was announced that engineers had found 12 more cracks through stress and loading tests which were previously not visible during the replacement of other damaged parts of the track.

[26] The LTA and SMRT announced that train services would resume on 1 October, though with temporary speed restrictions on westbound tracks for safety.

[18] Some voiced their frustration regarding the disruption and its spillover effects, including the longer travel time and the long walking distance between Jurong East station and its free bridging bus stop.

Some commuters avoided the affected section of the MRT system from Queenstown to Jurong East due to lack of safe distancing in all public bus services, and some of the elderly struggled with route changes on all days.

In response to the disruption, the Ministry of Education (MOE) announced that students taking the PSLE on 26 September were granted the full allocated time to sit their paper as long as they turned up before the end of the exam.

[31] Additionally, according to the Singapore Examinations and Assessment Board (SEAB), no candidates were affected by the disruption for the Mathematics exam on 27 September.

[8] The incident has been described by experts as "rare", with Dubai Road and Transport Authority's chief specialist of rail operations Jumadi Husani stating that "Under normal circumstances, the axle box, bogie... and train wheels do not come off from the train", adding that if it does, it was "mainly due to improper installation of parts after maintenance or testing activities or if defective components... are not replaced".

[36] Malcolm Dobell, who was the former Head of Train Systems for London Underground, was appointed as the EAP Chairman, and would also be assisted by five other local and overseas experts.

The investigation would involve finding the root cause of the axle box failure and the fault detection and incident handling procedures.