Brake fans
It occurs to me that, with the accountants demanding increasingly short turnrounds, high brake temps must be an increasing factor for short-haul departures.
Use of full reverse theoretically reduces engine life and increases fuel cost, so my feeling has been that, on long runways, idle reverse is the best compromise. But if the brake temps are above limits on the next scheduled departure, I would kick myself for not having used full reverse.
In my company, despite opposition from the accountants, our early A320s were fitted with brake fans. As well as the initial cost and extra fuel cost, their weight occasionally had a slight effect on available payload.
My question is: how many low-cost operators are currently fitting brake fans?