Well its resumed now so here is the news link.

Boeing plans to cautiously restart the CH-47 Chinook helicopter production line May 15, after shutting it down May 13 following the discovery of
what the company is calling irregularities in two aircraft.
Rep. Joe Sestak (D-Pa.), whose district includes the Chinook plant, said he learned of severed wires on one of the CH-47s and a suspicious washer in a
subsystem of the second aircraft. “After having several briefings [on the matter], I think there’s a low probability this wasn’t deliberate,”
Sestak said. “But it’s not out of the question that it’s the result of an accident.”
www.aviationweek.com...
So it sounds like it was damage that looked to have been intentionally done to the Helo while on the line. It was caught but they want to know why,
who or how.