3516 - External Smoke alarm. To check & ~~~~~ 3516 - External Smoke alarm.(Train Prep)  3516 FC 721 (smoke external). Checked #3516 external smoke detector found no cable gland. Found water ingress in smoke detector. OPS 20 raised to c/o external smoke detector.  Isam/Izzul/Faiz 45394 BSD: 3516 - To C/O External Smoke Detector