TC reported doors at RM1 car were not proven closed. TC recycled doors once - ok ~~~~~ 1666 TC reported doors car were not proven closed. TC recycled doors once - ok. CE clear OE request to follow up.  1666 ER D/L & found FC 973 (saloon door B3 close operation timeout - once.) Cleaned #1666 B3 door guide & J rail. Push/pull test = 9.2kgf. Performed door open/close operation test - OK. All Passed.  Dinie 44299