Did NW_Pilot Cross the International Date Line?

"Gig 601XL Builder" wrDOTgiaconaATsuddenlink.net wrote in message
...
I know he didn't but that's what caused F-22's computers to go Tits Up.

http://www.dailytech.com/article.aspx?newsid=6225


I am not convinced this is a true story. I googled/news "f-22,
international" and only got two hits for this story.

Having said this, this is the kind of error that gets past the programmers
and testers. But I don't see how the aircraft attitude displays and fuel
management software would be effected by a time error. I could see the
tactical displays relying on data links getting messed up, but not attitude
and fuel management.

Danny Deger

On Feb 27, 11:30 am, "Danny Deger" wrote:
I am not convinced this is a true story. I googled/news "f-22,
international" and only got two hits for this story.

It does sound funky, but try google news with "raptor navigation" and
you'll find a dozen stories over a week's time about their having to
turn back midway across the Pacific.

Having said this, this is the kind of error that gets past the programmers
and testers. But I don't see how the aircraft attitude displays and fuel
management software would be effected by a time error. I could see the
tactical displays relying on data links getting messed up, but not attitude
and fuel management.

I agree, it's hard to visualize that common a point of failure. One
of the precepts of good avionics software is that there's not supposed
to be a single code location that could cause global errors.
Obviously they goofed ;-) A guess is it went into an infinite cpu-
eating loop and that indirectly made everything else falter.

Kev

Danny Deger wrote:
"Gig 601XL Builder" wrDOTgiaconaATsuddenlink.net wrote in message
...

I know he didn't but that's what caused F-22's computers to go Tits Up.

http://www.dailytech.com/article.aspx?newsid=6225



I am not convinced this is a true story. I googled/news "f-22,
international" and only got two hits for this story.

Having said this, this is the kind of error that gets past the programmers
and testers. But I don't see how the aircraft attitude displays and fuel
management software would be effected by a time error. I could see the
tactical displays relying on data links getting messed up, but not attitude
and fuel management.

Danny Deger



Not being a software guru of any sort, but if the "working world" of
aviation works on GMT, which is the same time all across the world, why
would the plane's brain ever cared what the local time was? Obviously a
goof, but hard to see how it could even happen.

Dave