visit, может стоит посмотреть Part-25. Book 2 Subpart-G, 25-1581. Разговор идёт о содержании Flight Manual, там в частности, вот что написано:
(6) Take-off Speeds. The take-off speeds, V1, VR and V2 must be presented in the AFM, together with the associated conditions. These speeds should be presented in units consistent with cockpit instrument indication. V1 and VR speeds should be based upon ground effect calibration data while V2 speeds should be based upon free air calibration data. The take-off speeds associated with minimum control speeds and the maximum energy absorption capability of the brakes should be included. At the option of the applicant, the AFM may also include the V1 speeds associated with unbalanced field lengths. At all conditions and aeroplane configurations represented in the AFM (i.e., at all altitudes, temperatures, weights, winds, runway slopes, flap settings, etc.), the accuracy of the V1 speed should either 1) be within 1·5 knots of the V1 speed used to calculate the take-off and accelerate-stop distances, or 2) not cause an increase to these distances of more than the greater of 100 feet or the incremental increase resulting from a 1·5 knots variation in V1 speed.
Может Вам это поможет в переводе.