Final answer:
The flight with slats/flaps extended at high altitudes is prohibited due to safety reasons.
Step-by-step explanation:
The flight with slats/flaps extended at altitudes above certain limits is prohibited due to safety regulations. This is because the slats and flaps on an aircraft are used to increase lift and maneuverability during takeoff and landing. At higher altitudes, the air density decreases, which means that the aircraft needs less lift and the slats/flaps become less effective.
Operating the slats/flaps at high altitudes can result in decreased control and stability of the aircraft. It is crucial to follow the aircraft manufacturer's guidelines, which specify the maximum altitude limits for using slats/flaps.
For example, a Boeing 737 has a maximum flap extension altitude of 20,000 feet, while an Airbus A320 has a maximum extension altitude of 20,000 feet for slats and 20,000 feet for flaps.