Passenger feedback to staff (CLE) of aircon leakage at rear DT car. Staff (CNG) checked and confirme d of aircon condensate at rear DT car near 'B1' door leaking . ~~~~~ Checked and confirmed 3547 No.1 end having slight condensation 3547 A/C1 & 2 operation normal, cut in/out ok Checked both AC LP/HP - satis Replaced both AC filter element No sign of condensation when monitored LAI.M.K/10.02.23