TIMS showed external smoke at rear M1 car. Rear T409 did line clearfeedback no sign of smoke from BDL1 to BSH1.SM(AMK) checked, also confirmed no sign of he at or smoke at rear M1 car. ~~~~~ BSD: 1535 TO FIX RUBBER GLAND Done during PM check. 25/09/23 Team 6. 1535 TIMS showed external smoke. Rear T409 did line clear  feedback no sign of smoke from BDL1 to BSH1. SM(AMK) also confirmed no sign of heat or smoke at rear M1 car. CE: 1535 Smoke external alarm reset ok.  1535 FC: 723. Checked and found cable gland not present. No water ingress at smoke detector and terminal box. Cleaned dust accumulation at smoke detector and terminal box. Presence of gasket at smoke detector cover. Plaseal check - ok. OPS 20 raised for smoke detector c/o.  Aliff/Daniel/Redzwan 45183