a_pilot
Sure! Trend arrow is a very good indication of wind shear and aircraft acceleration but not the wind on ND. Monitoring of ND wind component is not mentioned in any airbus document nor is it required because there is no way it can calculate the vector correctly on ground. No action is recommended in any document on the basis of ND wind on take off. Normally Trend vector disappears on top but if it reappears, fluctuates or shortens TOGA is an option if stopping in remaining runway is doubtful. But ND wind plays no part in that decision. FCOM below:
The takeoff should be rejected only if significant airspeed variations occur below indicated V1 and the pilot decides that there is sufficient runway remaining to stop the airplane.
Last edited by vilas; 11th Sep 2016 at 10:59.