Originally Posted by Lonewolf50
With the above airspeed limits in mind, how benign do you think an unexpected ten degree nose down pitch is while on IMC, and possibly in turbulent air, with those limits considered?
NOTE: this is not a declaration nor an assertion that such is what happened with AF 447, but an inquiry regarding, as a pilot, your tolerance for a sudden ten degree nose down event.
Where did I express 'tolerance' for an uncommanded 10° pitchdown?
The speeds you mention are not 'limits', but recommendations designed to minimize the risk of exceeding structural and controllability limits.
Although I fully agree that unusual flight control system behaviour such as occurred in QF72 and in the A340 Airprox incident should be kept in mind, there are at present no indications that these occurrences have any relevance to AF447.