TC reported partition door handle loose.Video taken and send to TOCR. ~~~~~ 3518 TC reported partition door handle loose. Video taken and send to TOCR. CE : 3518 Partition door latching tongue does not spring back, door difficult to latch. Depot to check 3518 partition door handle.  3518 partition door checked/found handle was stiff. Removed handle and locking device, cleaned up locking device mechanisn and reinstalled both handle and locking device. Function check door handle able to spring back, opening/closing of cab partition door was smooth.  Redzwan/Aliff/Daniel 45310