2677 - AIR LEAK AT COUPLER. 1BAR/5MIN. T ~~~~~ 2677 - AIR LEAK AT COUPLER. 1BAR/5MIN. Awaiting Transfer: Notofication 2613722 Name                          : Danial H Date of Occurrence            : 30/6/24 EMU / Equipment / Location    : 2677/Auto Coupler Bi-Directional Valve Description of fault / cause  : Reported by Fazly (UPD) that Air leak from bi-directional valve (lower). After further investigations, it was postulated that cylinder was faulty as air was purging from outlet when piston is extended out. Refer to RSW notif/M.O: 2613041/12014245