Random SAI Noise

[specops1526]

Was sitting in traffic the other day and all of a sudden the SAI turns on while I'm stopped and I hear the typical dust buster noise. Was on for a few seconds and then went off. Happened about 2 times.

No codes on my ScanGauge. Any thoughts on what's going on?

Thanks

 

[number9]

Mine will do that on rare occasions. Hasn't become a worrisome issue for me yet.
......

 

[mbrummal]

That is probably the system doing an "active" test of the SAI system.

 

[discostew]

I think its just a self test of the system. When it runs on a cold start it's actually doing it's job. But sometimes it will want to complete a readiness test.

 

[number9]

That is probably the system doing an "active" test of the SAI system.

Thanks you're probably spot on. My simple logic would've been test done when active. Must decide/programmed to do that about once a month just see if we're still awake. That type of system test OK in LRs but not so good on an Airbus.
......

 

[specops1526]

Just drove my truck again today and it did it twice but only when stopped. It's pretty loud but short. I hope it's just a random test but maybe I've got a leak due to a broken hose? I'll need to inspect them this weekend.

Now onto fixing my P1590 due to my seriously squeaking brakes...