A321
Flight Crew Air Transport Pilot (ATP)
Situational Awareness
Aircraft Equipment Problem Less Severe; Deviation / Discrepancy - Procedural Published Material / Policy
Aircraft Equipment Problem Dissipated; Flight Crew Overcame Equipment Problem; General Flight Cancelled / Delayed
Procedure; Aircraft
Delayed at gate 45 for traffic in the alley; then pushed and started both engines. Idle thrust with ramp weight at approximately 184;000 LBS moved the aircraft forward on level ground. No brake 'dragging' noticed. At the end of the runway; taking off behind a B777; received 'line up and wait' instructions and a re-route from tower controller. About the same time; First Officer (FO) noticed the right outboard brake temperature Hot at 270 deg. He turned on the brake fan. After the re-route was loaded into the FMGC in takeoff position; the brake temp indicated 260; then 255. I started to tell ATC that we wanted to taxi off for additional cooling but then the ECAM showed 250 degrees so I said we were ready. With everything happening at once; I fell into the trap of 'completing the mission' instead of remembering that with the brake fan on; we needed them to cool to 150 or less. We briefly discussed leaving the gear down to cool the brake further after rotation. We did so; but noticed the brakes got a bit warmer initially then started to cool. I wanted to get the gear up for climb performance due to taking off behind the B777 so when I saw that the brake had started to cool; I elected to raise the gear. Unfortunately; we were slightly faster than the Vlo speed of 220. We were at about 235 KTS. The co-pilot then pointed at the placard showing the limitation. The brake continued to cool and after climbing above 10000 FT; I sent an ACARS message to Maintenance and entered the discrepancy into the log. Multiple tasks being addressed at the same time at a time critical situation. (On the runway) Not having enough time to think everything through properly.If I had a chance to do it over again; I would have exited the runway to allow the time to go through the scenario completely; and contacted maintenance to get some guidance on whether they wanted to look at the brake prior to the ETOPS flight.
A321 Captain reported that the right outboard brake temperature was high prior to takeoff.