TC reported Cab door 'A' side is jammed.TC confirmed cab door cannot be opened from inside nor outs ide. ~~~~~ TC reported Cab door 'A' side is jammed.     #3632-A/S found cab door able to open but was tight.Serviced & lubricate latch ok.Door function check using budget key handle & button all ok. Done by Haslan/Asruddin. 04/12/22