the aircraft, and we know about these things, now, and the sea check checks and the metal of the aircraft, they will go right inside of it to look for any form of met alpha teague or any structural failure, and so, yes, ashleigh, if it is, it is very unusual. >> and david soucie, this aircraft was built in 1997. it had clocked about 56,000 flight hours over the course of nearly 21,000 flights. i am a layperson and that sounds exhaustive for one aircraft. is it? if not, how many aircraft flying in the united states are of this age and of that ilk? >> well, quite a few actually. and we have extremely good maintenance systems for doing this, and it was mentioned