lomapaseo;
Re: post #502 (in reply to my post #512!)
please define the boundaries for this relatively short time.
There's that word "relative" again!
In the case of VH-EBA the UAS was for about 8 seconds and the SAT was -48°C. AF447 had UAS for 30 seconds (longer on the ISIS) and the temp was -43°C. VH-EBA had Goodrich pitots and F-GZCP had Thales, so it's not possible to compare directly for any relationship between ice build-up and time, though that's likely.
Neither do we know whether ice crystal accretion over time is responsible, or a near instantaneous build-up due to "super-cooled" water seeding into crystals on contact with the pitots. In the case of both aircraft, pitot blockage/unblockage occurred rapidly.
The "relative" part of your comment can only be answered subjectively on the basis that a small ice accretion will last a short time (seconds) and a larger one will last relatively longer, but still in seconds.
