Originally Posted by
Above The Clouds
So then you know that having the pressurisation controller set at 500 feet above the airfield elevation of departure would mean once the aircraft was descending towards SL and below 500 feet give or take variations in local pressure altitude that the hull should be de-pressurized below 500 feet or have very little pressure remaining in the hull, bar the squat switch not being activated as the gear was probably up for the ditching would leave a very minor positive pressure in the hull.
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The number of times I have sat waiting for it to bleed down on landing to be able to open the door is beyond a joke. The squat switch is unreliable to say the least. It only takes a tiny differential to stop that door opening from first had experience. But its a moot point as they have found at least one body inside the wreckage.