Taken from Mike Sinnett's publication:
The first main layer of protection provided by the update is a cross-channel bus between the aircraft’s two FCCs, which now allows data from the two AOA sensors, or alpha vanes, to be shared and compared.
Is this a hardware change, it certainly reads like it?
If it is,
- what are the certification implications? and
- what are the retrofit requirements - minutes / hours / days per aircraft?