TIMS showed Smoke External Alarm at car3614. Staff(AMK) checked and confirmed no signs of smoke / f ire / burning smell on exterior or interior of train. Rear T 218 line clear and confirmed no abnormalities. TIMS showed S ~~~~~ 3614 TIMS showed Smoke External Alarm. Staff(AMK) checked and confirmed no signs of smoke/fire/burning smell on exterior or interior of train. Rear T218 line clear and confirmed no abnormalities. CE Found 3614 - TIMS shown smoke external. Reset fault cleared. No abnormality found.  3614 FC 721. Checked external smoke detector cover with gasket, no rubber gland on    connector. Swapped SDR11 from #3614 to #1614 for monitoring. OPS 20 raised for smoke detector c/o.  Aliff/Daniel/Redzwan 45367 3614 - C/O of External Smoke Detector due to no cable gland.  3614 no.2 end smoke external detector replaced with cable gland and function checked ok. Notification: 2581331 Done by: Saini/Din 45370