Originally Posted by
sefrischling
The QF flight issue is currently believed to be electro magnetic interference by a US/Oz naval communications base and their radio transit tower that is 20-feet taller than the Empire State Building. A Malaysian Airlines 777 experienced a nearly identical problem, in nearly the same place, which narrows down the cause of the issue.
The thing is pretty far away from Perth (though the QF flight diverted to an airport quite close to it). It's visible on Google Street View.
Maybe the VLF frequency is near the dithering frequency of the RLGs.
From Wikipedia: "The base is currently operated under contract by Boeing Australia, Ltd.". Perhaps Boeing took it over and modified it to only affect Airbus aircraft.