Rear cab entry indication illuminated. Staff (KTB) checked and feedback 'A' side partition door was opened and unable to be secured fully and will be prone to b e opened on its own. Staff confirmed no unauthorized person, ~~~~~ 3508 checked found partition door handle was a bit loose. Retightened the door handle & function test - OK. Security check & rear cab entry indication check - OK.  Alan/Lee PT/Shafie. 07/05/2021.