Here’s me taking off in HKG filmed by my wife, dispatched with a brake fan inop which required you to leave the gear down for a given time ( a minute or two from memory) for cooling, if you had a subsequent engine failure you raised the gear, all briefed & understood before take off. (Please turn off volume 😳)
If you got an ECAM caution after gear retraction you would have to slow down if required to below gear extension speed, lower the gear & let the temps reduce, a 200 KTS breeze does the job quit well.
On a side note if you have all engines operating regardless of gear up or down performance/noise abatement is not an issue on an airliner, unlike a GA twin.
IMG_3426.mp4