Howdy again Wyleem,. .. .Yes there is a chart which is located in the MEL.. .ref MEL 02-32 p3 (32-47).. .. .From FCOM 2.02.20 p17. ."The FCOM 3.02.32 Hot Brake Procedure gives a temperature of 300 deg C as a maximum prior to take-off. This limit is designed to prevent possible ignition of hydraulic fluid in the wheel bay in the event of a hydraulic leak after gear retraction.. .. .The MEL charts were designed to cater for the case of Loss of Brake Temperature Indication. However, they are equally valid for assessing cooling time following a RTO or Landing.". .. .Hope this answers your question.. .. .Samuri