Just before the KLM 4805 take-off, Captain Jacob Veldhuyzen van Zanten commands "Wipers on", and he harshly repeats his command when the Flight Engineer mishears it as "Lights on": however, the earlier shots clearly show the wipers are already running.
The KLM aircraft was a Boeing 747-200, with a cockpit crew of three - and all interior shots of the cockpit are correct. However, the external shots clearly depict a 747-400 (easily distinguishable by the winglets on the edges of the wings). Not only does the 747-400 have a cockpit crew of two (without the flight engineer) and a different instrument panel that is shown - it also entered service over 11 years after the Tenerife disaster, in 1988.
When Walter looks out at the airport after exiting the KLM plane, a Finnair plane is shown passing a parked Air Europa plane. However, the livery of the Finnair aircraft was only introduced in 2000, and Air Europa wouldn't even be founded for another 9 years.
KLM's first officer gives the V2 speed (the takeoff safety speed - minimum speed at which the aircraft is able to take off) as 135 knots - 250 kph or 155 mph. It would require a hurricane-force headwind to allow a heavily fueled Boeing 747 with 250 people on board to take off at this speed (smaller and lighter 767 has a typical V2 speed - with 200 people on board - between 150 and 170 knots).