So I have been flying the ngx for some time now and suddenly the autobrake wont arm.

If I set it on 2 for an example no light becomes illuminated. Immediatly after touchdown the 'autobrake disarm' light becomes illuminated, this forces me to use manual breaking. I honestly have no idea what caused this because last week this problem didn't occur.

Any ideas  :rolleyes:

There isn't a light which will come on when you arm the autobrake. If they are disarming on touchdown it could be due to manual brake pressure being present. If you have hardware brake pedals check the calibration.

 

Alternatively it could be a failure set by the system. Check for any active faults in the FMC CDU.