At the end of the last link posted. They have a Boeing Engineer commenting on the KC-46. And it's issues
Ah, the KC-46. The airplane I ended my career at Boeing with. What a train-wreck that thing is. If you only knew the half of it, you would be shocked. Boeing will never make a single penny on that program. Not one. First thing is that the major airframe structure is actually based on the 767-400 freighter. What is that you ask? I know that's not an actual thing, yet, but it's in the engineering database... Oh, and did you know that the first major hick-up was that someone forgot to actually calculate the volume of the cargo deck to see if it could actually hold the required amount of fuel per contract?
Yeah, it was too small. Solution? Take your already-engineered airplane and throw the majority of the drawings away and start over! Lower the cargo floor, revise the stanchion locations, push out the sidewalls, come up with thinner designs for the main deck, fittings, etc. Then we can just barely squeeze those tanks in there! Oh, you mean we have to actually have enough room for a man to bolt those tanks in place in the factory? Crap!
And I suppose you are going to require us to have enough room for an airman in arctic gear to be able to unbolt them and remove all the tanks in under an hour? Good news! If we have floor panels that flip up on the main deck, we can then grab that airman by his ankles and lower him/her head first to the locking bolts.
Oh, and we're going to save tons of money by reusing pre-engineered systems too! Wait, those "engineered" systems that have non-conforming hand-drawn sketches and are rife with errors? Oh, I guess we need to update those! Don't worry, we've been building the derivative that those systems exist on for decades! We'll make it up by reusing the installation plans the factory has successfully been using without error!
Yeah, the plans that say "install per drawing" and references the already mentioned poor engineering and don't meet any Boeing process specification in existence.
Guess we'll have to work our Manufacturing Engineers 7 days a week for 8 months straight! Don't worry, we'll lay them off when we're done with them! I can go on...and on...and on...super panels, panoramic fairings, promising work to Japan for cost-sharing, then undercutting them and stealing it back, fuel lines that don't conform to spec, center hose pressure bulkhead...oh wait, that actually worked out really well.
Oh, want to know why there isn't a man laying in a pod looking out a window? Because there's no room once the lower 46/47 is stuffed with fuel in order to meet requirements. So, spit shine it with some high-tech razzle dazzle and talk of "better teaming on the flight deck" and call it good.