Operating with brake unit u/s or tachometer
MEL entry
42-01 Main Wheel Brakes
Note : If one brake only is inoperative and the AUTO/BRK function is operative and used, a braking asymmetry can be expected at takeoff and landing, and compensated by the pilot using rudder.
Takeoff Performance
The following method may be used for takeoff performance determination if no takeoff data (Predetermined by using OCTOPUS program or other equivalent program with present failure case taken into account) is available.
Note : If both engines are operative, keep landing gear down for two minutes. In case of engine failure at takeoff, retract landing gear when positive climb. Vibrations may be present during one or two minutes after landing gear retraction.