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In the middle of the Machinists strike, Boeing inspectors in Everett discovered a new, embarrassing and serious point in dispute through the synod of the chief 787 Dreamliners.

Boeing said Tuesday about 3 percent of the fasteners installed on the five test airplanes while suffering construction in Everett were installed incorrectly and must be removed and reinstalled to protect the airplane’sitting structural integrity.

“It’s a matter of whether the structure will hold together properly,” said Boeing spokeswoman Lori Gunter.

“In commercial airplanes, it has to have being right. It can’t be ‘good sufficiency,’ ” she said. “So we go away from the thicker settlements and we fix it.”

Boeing said more of its global partners, though it wouldn’t specify what one. ones, later found the same fastener problem in airplane sections under construction at their factories.

The unique fasteners were used inside the planes to fasten titanium structural parts to composite plastic parts.

Boeing wouldn’confidentially disclose exactly where the problem fasteners are located, mete Gunter said lengths of titanium are used in the fuselage frame to stiffen the plane’sitting skin and to strengthen talents of the structure, including the seams where the of great size sections join.

Boeing has not determined yet if the problem will further delay the 787 schedule, or whether it can be fixed during the period of production buildup after the strike.

The fastener issue was in the beginning detected about sum of two units weeks ago during an scrutiny of the “static test” airframe in Everett, an early-production airplane that undergoes prolonged stress tests in a large fixture inside the factory.

The static test plane was subjected to a “high move test” Sept. 27, at the time the internal pressure is raised to 1.5 times the maximum the jet might see in service. Gunter said the fasteners did not come short for the period of this test, proving the strength of the structure is across what it of necessity to be.

Nevertheless, when inspectors afterward discovered the problems with the fasteners, Boeing couldn’familiarily ignore the potential reduction in the plane’s structural integrity.

Inspectors later found the like moot point on the four 787s in final assembly, three of that are due to be flight-test airplanes.

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