Originally Posted by Bernd
This is interesting. As others have pointed out, there are 3 ADIRUs. Are there really no cross-checks to detect a failure in one?
Originally Posted by NSEU
I'm also wondering how aircraft computers process "spiking". Obviously the spiking on this particular aircraft was not large or rapid enough to be considered ridiculous and the value rejected
The way it works, the system does not automatically discard a faulty unit but it identifies that faulty unit and advises the crew to first select a reliable source of information and then turn the faulty unit off.
As you know that’s the crew responsibility to perform the requested ECAM action(s)
According to the ATSB an Inertial Reference System 1 Fault ECAM Message has been triggered which would mean the crew has been advised but it is not clear if the requested ECAM action(s) were properly completed ?
In order to "minimize risk in the unlikely event of a similar occurrence" … an Operational Engineering Bulletin is on its way … Is it simply to emphasize the already published procedure or is it something new the QF72 crew could not have known before ?
Standing-by for the OEB …