What is the maximum tailwind component allowed for takeoff and landing?

The maximum tailwind component allowed for takeoff and landing in the ERJ 170 and ERJ 175 aircraft is 10 knots. This limitation is critical because excessive tailwind can adversely affect the aircraft's performance during takeoff and landing phases. The aerodynamic characteristics of the aircraft are optimized for operations within specific wind limitations, ensuring safe handling and performance margins are maintained.

Flying with a tailwind component that exceeds this limit can lead to longer takeoff distances and reduced climb performance. During landing, it can increase landing distance required, potentially leading to runway overrun situations if the aircraft is not stopped in time. Such restrictions are established based on operational safety and performance data gathered during aircraft certification and testing.