Originally Posted by
Capn Bloggs
The QF A330 that took the plunge, twice, didn't result in grounding the fleet, despite the authorities NEVER working out what happened. Airbus came up with a procedure where crews push-button-disabled a particular system.
If you're comfortable handflying and the aeroplane starts doing something in pitch you don't like with, say, full back stick, you trim against it. Or you grab the trim wheel and stop it. Or you engage the AP! My point is, you have to be happy with hand-flying to be able to have spare brain space to try something.
So, is the STS the culprit when the speeds/AoA go haywire?
Yes the QF A330 didn't result in a grounding, nor was the erroneous ADIRU issue resolved. The 'incident' wasn't fatal. One can imagine the pressure bought to bear by both operators and manufacturers on the regulator was substantial.
In this case, 189 souls were lost.
In a different era perhaps prudence would prevail.