一列觀塘綫往調景嶺的列車，在駛到太子時，車長發現煞車氣缸的壓縮空氣驟減，控制中心遂安排故障列車停止服務
基於被動安全（Fail-safe）設計，鐵路車輛的煞車需由壓縮空氣鬆開；當系統異常或有喉管漏氣，車輪便會鎖死，以策安全
因此，觀塘綫 油麻地 至 鑽石山 的列車服務曾一度停頓
及至約 1915 時，故障列車經石硤尾的渡綫駛往油麻地方向，並泊在油麻地站的壞車側綫，讓觀塘綫的列車服務恢復正常：http://www.vjmedia.com.hk/articles/2013/08/18/46681/sidings/
A Train Captain found the pressurised air inside the brake cylinder was running low when his Tiu King Leng bound Kwun Tong Line train had berthed at Prince Edward. Operations Control Centre then took the train out of service
Because of the fail-safe principle, the brakes of carriages must be released by pressured air. Wheels will be locked-up when there is any system abnormality or air leakage for safety reasons
Therefore, train services between Yau Ma Tei to Diamond Hill were suspended for a while
At about 1915 hours, the malfunctioned train moved to the Yau Ma Tei bound track through a crossing at Shek Kip Mei and parked at the Refuge Siding near the station to facilitate the resumption of train services on Kwun Tong Line
