Factual error: Although it's a commonly used movie trope, cutting the brake lines on a bus would not produce the effect seen in the movie. Buses use air brakes, which by design, can operate even with substantial loss of pressure and often engage automatically if there is too much pressure loss.
Suggested correction: I don't know what air brakes you have used but the very nature of air brakes means that low pressure means they can't work. If you have no pressure in them, how are you supposed to press the brakes? I have personally driven hundreds of vehicles with air brakes (I am a truck driver by trade) and can tell you this is a fact. All that happens when air brakes lose pressure is a warning light on the dash and an alarm sounding in the cab, one must manually slow down the vehicle at that point.
I respect the fact that you drive a truck, but my dad has been a master mechanic for more than 50 years and he is the one who pointed this out to me. Depending on the system, there are various fail-safe systems that will engage the brakes during an emergency loss of pressure. Plus, a simple Google search led me to several examples of these systems.
Factual error: The sisters run out of fuel for the helicopter, which is then shown slamming down on the ground and essentially destroying itself. All helicopters are capable of autorotating safely to the ground in the event the engine(s) quit. Of course, that would not have been as dramatic. (01:05:15)
Suggested correction: You may have noticed the helicopter was severely damaged, it may not have any rotating capabilities left after the fuel was gone.
I did notice it, but it did not look that any damage would prevent it from autorotation.
Perhaps the sisters (not being experienced helicopter pilots) couldn't use the autorotation properly.
OK, while that may be a possibility, if they have a helicopter pilot's license they would have had to demonstrate autorotation as part of both the curriculum and the practical exam. But listen, it's just a movie. The way they did it makes it more dramatic.
Factual error: Druig leads several warriors outside Tenochtitlan as it was sacked by the Spanish conquistadores, and they live peacefully in the nearby forest, for 500 years. The forest is of course the virgin Amazon forest, as captions say. Small problem; Tenochtitlan was in Central Mexico.
Suggested correction: It never says that the people who live with Druig in the Amazon in the present day are descendants of the people from Tenochtitlan. Nor does it ever say that the forest outside Tenochtitlan is the Amazon. He's probably been moving around for the last five centuries just as the other Eternals have.
Never ever? He literally says "Do you remember this forest? Beautiful. It's the last place we all lived together. I've protected these people for 20 generations." They split after their argument during the sack of the town. If their base of operations exterminating the mutant space dogs in Mexico was in the Amazon forest, their logistic could use some work.
Just because the last time they fought together was in Tenochtitlan doesn't mean that was the last time they lived together. They may have spent some time living peacefully in the Amazon before moving north to do their business in Tenochtitlan. And just because he's protected the people for twenty generations doesn't mean they're descendants of the people from Tenochtitlan. He may have found them later. We don't know every detail of the Eternals' history. You're just making assumptions.
You are assuming the presence of a third party stranded for 500 years that the movie never showed before, different from the people that he led out of the city and that we have then to postulate he let go, in a location far off from the one of their last encounter. It's an assumption on entirely new details that you had to make up. My only assumption is to think that what is shown in the movie had purpose and fits, and someone just borked a caption.
Who says they're stranded? He just said he had protected them for twenty generations. They'd probably always lived there. You're making the assumption that they must be the same people because nobody said they weren't. But nobody said they were either. Nobody in the film ever made a connection between the people in Tenochtitlan and the people in the Amazon. No mistake has therefore been made in either the dialogue or the captions.
I noticed the same problem, the scene indicates the location as "Amazon" (it could be any of the Spanish speaking countries that have part of this forest), but then, Druig comes with the affirmation you pointed. It's obviously a geographical inaccuracy.
They don't speak Spanish in the Amazons.