It's not unlikely because it happened repeatedly: https://www.pprune.org/rumours-news/558483-iced-aoa-sensors-send-a321-into-deep-dive.html https://www.pprune.

It's not unlikely because it happened repeatedly: https://www.pprune.org/rumours-news/558483-iced-aoa-sensors-send-a321-into-deep-dive.html https://www.pprune.org/rumours-news/558483-iced-aoa-sensors-... http://avherald.com/h?article=410c9cec/0015 http://avherald.com/h?article=410c9cec/0015