PPRuNe Forums - View Single Post - A320 unreliable speed . . . only if you are a nerd like me
Old 13th Dec 2015, 14:01
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CONF iture
 
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Originally Posted by 737Jock
We tried the same scenario without switching ADRs off just to see what could happen, outcome wasn't pretty. Would have hit the ground at 12000 ft per minute if it wasn't for sim freeze.
Once activated, AoA protection should have taken priority ...

Originally Posted by ExV238
But so is the report into the recent RAF A330 Voyager tanker upset, caused by a loose object pushing the stick full forward. In the latter case, the captain, at a loss to understand the behaviour of the aircraft, considered switching off the ADRs. However, the high speed protection was active at that moment and protecting the aircraft. Had the ADRs been switched off, or a 'shiny red button' been used, the aircraft would almost certainly have been lost due to grossly exceeding design speeds.
This time the other guy had left the flight deck, but first step first, in all logic and in first priority he would have attempted to counter the sudden dive using his own sidestick, priority switch or not, kind of the way it happened for Lufthansa on takeoff.

Once a friend of mine took delivery in Toulouse and asked the question why didn't they install a red guarded switch to force direct law and kill any interference ?
The answer was : "Some pilots may use it"
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