Sources tell KING 5 that a Tuesday flight test designed to test Boeing's new Lithium Ion battery fix, has been scrapped for unknown reasons.

A ground test on board a 787 Dreamliner at Boeing Field is still expected. Lab tests are also ongoing.

A 787 built for LOT Polish Airways is expected to be the first flight test to verify the system, to prove to the FAA that Boeing's upgraded battery is safe.

Two months ago, on the evening of January 16, the FAA announced it would immediately ground the 787 fleet after a second 787 lithium-ion battery incident. That day the forward battery aboard an All Nippon Airways jet started smoking while on a domestic flight in Japan.

The incident in Japan came just nine days after a 787 battery in the rear of the plane smoked and caught fire while on the ground following a flight from Tokyo to Boston.

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