The A330 Autopilot can't handle varying erroneous airspeed from 3 sources, so it disconnects and hands the task to the pilot. That shows a lack of forethought.
Juneau, the capitol, is reached from the rest of Alaska only by sea or by air, so a lot of gold has been spent perfecting low IFR approaches. The GPS approach and go around are hairy enough on a good day, but if the mountains block the signal on go around, the A/P reverts to IRU guidance to give a precious 30 seconds flywheel effect. That is true for the 737 A/P as well as the HUD.
Why is there no flywheel in the A330 A/P to provide reversion and stability, and continue flying when sensors fail?
Last edited by Jetdriver; 28th May 2011 at 22:08.