T431 3690(N) Reported Fire External at 1 ~~~~~ T431 3690(N) Reported Fire External at 1     Smoke external fault intermittent happen.Further check external smoke detector condition NG having alot of dust on mushroom side and pcb mounting broken.C/O as preventive measure and function test ok. Smoke detector:- S/N: Nil Not: 2473055 raise. Done by Koh. 23/03/23