Is there any reason why I can't reset the failure for brake temps and tyre pressure failures? If I try and fix it, the tyre pressure error goes off but the brake temp stays, and then tyre pressure comes back on. (on the 748!)

 

You’ll probably have to cool the brakes first. FS Actions -> Ground Maintenance.

yep that worked, thanks 🙂

If you are into your realism, keep in mind that to cool the brakes on an airliner (in the real world, so one assumes this would be the case on your sim version), you don't leave the parking brake on when you immediately get on stand. What you do is stop on the stand, use the brake to hold the aircraft still, shut the engines down, switch the anti collision beacons off when the engines have spooled down so the ground crew will know it is safe to approach the aircraft, they then chock it. You will know when it is chocked, because the jetway won't be put onto the aircraft until that has been done. In the real world you can hear the jetway moving because it has a beeping horn sound or siren when it moves as well as amber flashing lights when it is in motion.

When the aircraft is chocked, you can release the parking brake and know the aircraft won't roll back or forward because the chocks will hold it. If you leave the parking brake off for a while, it will allow the brakes to vent better and so they will cool down properly whilst you are doing all the stuff you need to do before leaving the aircraft secure. This is a fairly important thing to do, because the tire pressures on an airliner are really high (usually around 218 psi on most airliners) and if the brakes don't cool down properly, it can stress the tires; if a tire at 218 psi blew whilst the aircraft was on the stand, it could throw off a lot of shrapnel which could not only damage the aeroplane, but would also be very dangerous for the ground crews.

When the brakes have had a good amount of time to cool down, you can put the parking brake back on before leaving the aircraft. This is why when the pushback crew first contact the flight deck for a headset check in preparation for pushing it out for its next flight, they should ask you to confirm you have the parking brake set (in case the previous crew forgot to do that, which is unlikely but not impossible). Later they'll ask you to release the parking brake when they commence the pushback.