At what altitude is the maximum limit for extending Slats/Flaps?

The maximum altitude for extending slats and flaps is often set at 15,000 feet. This altitude is significant because extending slats and flaps at high altitudes can lead to undesired aerodynamic effects, including the risk of stalling due to lower air density and less lift at higher elevations. Pilots are trained to adjust their configurations within these limits to ensure optimal aircraft performance and safety. It is crucial for maintaining controlled flight and handling characteristics, particularly during critical phases such as approach and landing. Understanding these limitations is essential for safe aircraft operation.