Originally Posted by goeasy
Brake fans are over-used by the many pilots who think brakes must be stone cold at push back. Whereas I understand carbon brakes are much more efficient once warmed up. So why does FCOM state switching brake fans on as soon as one reaches 100deg?
Originally Posted by FCTM NO 040 p6/10
The FCOM limits brake temperature to 300 ˚C before takeoff is started. This limit ensures that, in the case of hydraulic fluid leakage, any hydraulic fluid, that may come into contact with the brake units, will not be ignited in the wheelwell. This limit does not ensure that, in the case of a high energy rejected takeoff, the maximum brake energy limitation will be respected.
300C isn't a target for takeoff, its a limit, one which subject to the conditions of the day may be too high...