Make the text more cohesive, logically linked and consistent as a whole: The Learjet came within 4.15 nautical miles of a Boeing 767-300 on the same approach towards Mexico City International Airport, wheras for safety there should have been around 5 nautical miles of separation between the two.
The Learjet came within 4.15 nautical miles of a Boeing 767-300 on the same approach towards Mexico City International Airport, whereas for safety there should have been around 5 nautical miles of separation between the two.