TIMS indicated smoke external at car 2550. Rear train line cleared, checked and confirmed no heat no r smoke. TIMS indicated smoke external at car 2550. Rear tra in line cleared, checked and confirmed no heat nor smoke. ~~~~~ 2550 TIMS indicated smoke external. Rear train line cleared, checked and confirmed no heat nor smoke.    TIMS indicated smoke external at car 2550. Rear train line cleared, checked and confirmed no heat nor smoke.  2550 Checked external smoke detector found with incorrect cable gland. OPS 20 raised for smoke detector change-out.  Wong/Aqil/Akira 45374 bsd To replace  2550 external smoke detector  2550 Replaced smoke detector  and function test ok/Fault code 721/735 Done by Kamal/Firas 31.03.2024