The launch of Endeavour from Kennedy Space Center has been put back until next Sunday, May 8th, NASA said yesterday.
A last-minute fault has been traced back to power switches that operate heaters on a fuel line in the auxiliary power unit.
No, we don’t know exactly what that means, either, but it sounds pretty important.
The switches have to be replaced, then tested. Then tested some more. It’s going to be a busy week for those auxiliary power unit fuel line power switch engineers, we can be sure of that.
(Via NASA)