From what I can tell, in order to make this story stick, you basically have to accept eyewitnesses from 20+ years ago, and for the majority of it you have to slant it to a negative angle.
Except that it was contemporaneous... they reported what they saw and experienced immediately, and were questioned about at length by the FBI at the time. Their story has not changed in all that time.
Adult and child asks to see the cockpit? Pre-9/11 this was so common, it wasn't unusual for aviation enthutiasts to spend the entire flight up front if the crew let them.
Asks? Yes.
But granted after that adult and the other adults with him were observed by the cabin crew to be acting suspiciously....seriously enough for them to report it to the captain? Err, no so much!
Person in a burqa has hairy hands, so it must be a man? Because no woman has ever had hairy hands?
Large hairy hands, and both of the female cabin crew suspected that this was a man wearing women's clothes and a burqa
Passengers on board annoyed that their flight won't be departing? Welcome to the aviation industry since forever.
Firstly, they were not just annoyed, they became agitated. It might be reasonable to say things such as
"we have connecting flights", or
"we have to be at our (destination) by such and such a time" but
"we just want to take off" is highly suspicious wording given that is was later discovered that the pilot hijackers only wanted to learn how to fly the aircraft (as in to control the aircraft in the air) and were not interested in learning about taking off or landing.
Boxcutters found on the neighbouring aircraft, therefore they must be planted? But boxcutters weren't banned from aircraft pre-9/11, so why go through the hassle of smuggling them in? And that's without going down the wormhole of aircraft registration.
Really? You think it would be normal for things like boxcutters to be found in the seat pockets of aircraft?
As for the crew observing persons in the aircraft after leaving it, I have several issues with that. First off, airplanes aren't locked.
Well they are shut, and the air bridge is retracted. After that, there are only two ways to get in.
1. Get a set of air stairs and move it to the main cabin entrance. There are very few sets of air stairs at JFK, and they are vehicle-driven either with the stairs themselves built onto a light truck, or they are towed using an aircraft tug.
All vehicle movements on the tarmac and apron require authorization from ATC... nothing, but nothing moves on a tarmac without their permission, especially at an airport like JFK. So, using air stairs would be out of the question. Someone doing so without prior authority will be spotted by the control tower.
2. Access through the Forward E&E Bay access hatch.
Accepting that maybe the doors were closed (though I can't imagine why)
Because the flight crew were instructed to do so!
...most ground crew and certainly any maintenance crew would know how to open the door from the outside.
Christ on a bike! Aircraft maintenance personnel
do not just wander into aircraft off their own bat and/or without authority. They must first have a legitimate reason for entry (i.e. an actual logged and authorized maintenance task to perform) and they must have permission from the airline's maintenance division or their maintenance contractor. Furthermore, entering through the E&E bay hatch is a very, very rare occurrence for the reasons I have mentioned earlier.
Oh, and in case you were wondering if this has just been the case since 9/11, it hasn't. this has been SOP the world over since forever. It certainly was the case when I was involved in the 1990s
And then there's the question of how they were able to observe it, since aircraft generally park nose-in at terminals (they certainly do at JFK), so it wouldn't have been possible to view it from the terminal, and the jetways in the US are only just now beginning to switch over to glass jetways.
Yes and No, and it depends on which terminal you are talking about (there are 8 terminals at JFK that have between 10 and 30 gates each). Many of the terminals have aircraft gate parking at angles between 22½° and 0°. You would not have to be far to the left (767s always board/deboard on the left) to be able to see what is going in inside an airliner from the terminal building.
But that may just be my 2 AM insomnia writing...
Yes