A33Zab
If certain values are exceeded abnormal attitude law is triggered.
- Pitch (50 degrees up, 30 degrees down)
- Bank (125 degrees)
- AOA (>30 degrees, < -10 degrees)
- Speed (>440 kt, < 60 kt)
- Mach (0.96, 0.1).
The above has been the accepted list of "triggers" for this event, and looking at the list you would assume that either of the 5 noted conditions would be the "trigger". It now appears, if the BEA press release via Flight Global is to be believed, that if the ADR's have all disagreed, the only "trigger" depends on an Inertial upset whereby items #1
and/or #2 above are the only means of entering Abnormal Attitude Law.