Rear cab entry indication illuminated. Staff(BBT) checked and feedback 'B' side partition door was o pened. Staff(BBT) checked and confirmed no unauthorized pers on, no suspicious item and all switches (sealed and unsealed ~~~~~ 3634 cab entry indication illuminated. Staff(BBT) feedback 'B' side partition door was opened. Staff(BBT) checked and confirmed no unauthorized person, no suspicious item and all switches(sealed and unsealed).  3634 found A/S cab partition door leaf lock guide    plate(2x) mounting screws loose. Retightened the screws & function check cab partition door - OK Security check - OK.  Kana 44433