How much extra data logging takes place in the B777? I know there's the official stuff at the back in the orange-coated titanium, but do the engines have some short-term logging available as well as part of their control system? I ask because I have vague recollection of such data being available and a useful input to an investigation once where data from the FDR wasn't available. I assume it's there in part to allow the engine manufacturers to obtain performance data in normal use rather than any real expectation of its availability for post-crash analysis.
Last edited by llondel; 25th Jan 2008 at 17:10.
Reason: spurious apostrophe