During a flight I activated an ADR 2 fault. While doing the ECAM procedure, I noted that the Air Data Switching knob seems to be inverted. When I select F/O on 3, nothing happens , the F/O PFD still has absent air data (SPD/ALT/V/S). When I select CAPT on 3, the F/O PFD receives what I suppose is Air Data from ADR 3 and gets back to normal. Also noteworthy is that the ecam procedure line AIR DATA SWTG... F/O ON 3 only disappears when selecting CAPT ON 3. Please check the attached pics. The first one shows the situation when I select F/O on 3 (correct procedure). The second one shows what happens when I select capt on 3 , which effectively solves the problem.
By
PMSoares ·
![Rafi [Aerosoft]](https://forum.aerosoft.com/uploads/monthly_2026_02/Rafi.thumb.jpeg.4a2295ac3b06910d02314bef45e636ec.jpeg)
![Laura [Aerosoft]](https://forum.aerosoft.com/uploads/monthly_2026_02/LK2klein.thumb.png.2355135640446de22b75f0b6628f1c15.png)
