When will you have red lines through TO/TO?

When will you have red lines through TO/TO?

• A. Flaps not in 8 or 20
• B. Vr and V2 split by more than 26 Knots
• C. Both Flaps not in 8 or 20 and Vr and V2 split by more than 26 Knots
• D. Neither condition

Answer: (C)

Red lines through TO/TO appear when the published takeoff data can’t be relied on for a safe takeoff. In the CRJ-550, the standard takeoff data assume a specific configuration and speed relationship. If you choose a flap setting other than the standard 8 or 20, the published takeoff performance isn’t guaranteed to apply. At the same time, if the rotation speed (Vr) and the takeoff safety speed (V2) are separated by more than 26 knots, that indicates an abnormal or nonstandard acceleration profile that the data aren’t designed to cover. Only when both of these conditions occur do the red lines get displayed, signaling you must verify performance manually or consult alternate data. If only one condition is present, the system may still consider the takeoff data valid, so the red indicators aren’t shown.

Red lines through TO/TO appear when the published takeoff data can’t be relied on for a safe takeoff. In the CRJ-550, the standard takeoff data assume a specific configuration and speed relationship. If you choose a flap setting other than the standard 8 or 20, the published takeoff performance isn’t guaranteed to apply. At the same time, if the rotation speed (Vr) and the takeoff safety speed (V2) are separated by more than 26 knots, that indicates an abnormal or nonstandard acceleration profile that the data aren’t designed to cover. Only when both of these conditions occur do the red lines get displayed, signaling you must verify performance manually or consult alternate data. If only one condition is present, the system may still consider the takeoff data valid, so the red indicators aren’t shown.