Snaprep: 2520 Pax reported unusual noise ~~~~~ Snaprep: 2520 Pax reported unusual noise heard from carriage. CE feedback 2520 bogie 1 & 2 wheel flat noise.  2520 ER D/L & found no BCU fault registerd. Performed dump v/v test - OK. Torsion arm nut checked for any looseness - OK. Bump stop clearance checked - OK. Checked wheels for defects & found the following : #2520 : B1 - W/F 5 x 5mm multiple spots         A1 - W/F 3 x 3mm multiple spots         B4 - W/F 2 x 2mm multiple spots         ST found on A2/A3/A4/B2/B3 Notif 2266910 raised for wheel profiling.  Khairul/Koon PL 44300 Notif 2266910 EMU 519/520 request for wheel profiling at 2520 B1 (wheel flat 20X40 / pitting), 2520 A1 (pitting), 2520 A4 (wheel flat 15X40) and 2520 B4    (pitting).