SM (RFP) feedback that there was loud air hissing sound coming from the exterior of the train at therear DT car. Staff (TIB) checked and confirmed presence ofloud air hissing sound coming from the exterior undercarriag ~~~~~ CHECKED AND FOUND 3549 WFL HOSE WITH CUTS AND DISLODGED.REPLACED WFL HOSE AND FUNCTION TEST OK.RAGHU 17.05.2022