Stator_Vane,
This is interesting, we don’t operate those models of B737, but I have checked the Brake Cooling chart for the following aircraft, B737-200/B747-400/B777-200.
In these the brake cooling time appears to follow these rules.
Decreasing weight = shorter cooling time.
Increasing Brake On Speed = longer cooling time
Increasing Pressure Altitude = longer cooling time
Increasing OAT = longer cooling time
I have no idea why your charts are different, but it would be worth a quick message to Boeings FLOE department.
Mutt.
