Ya kind of wondered that myself.
strange that the B767 was also 5.7 hrs.. and that is no spring chicken.
Makes me wonder if the 5.7 hrs is a regulatory thing or if High Tech A330 designers used the old tech, boxed up, off the storage shelf 1970 technology IRS's.
.............. just answered my own question...it is a regualtory thing.
Fcom 2.04.46 P3 says..
As per FAA notice 8400 this limit is
6.2 hrs from irs gnd alignment or 5.7 since last fm update...
Im new on the bus, so how do you know when the last update was?
On the boeing , you got an IRS NAV only message, ( which meant that the last update was 12 mins ago) is it the same on the Bus ???
The buses Im flying all got space nav, have only had one flight with no GPS avail.
Last edited by neilb767; 7th May 2008 at 00:54.