Witnesses said the refrigerator-size panel hit the ground and skipped about 30 feet before stopping in a street Friday morning. No one in the neighborhood about 15 miles south of Seattle was hurt.
Neighbors say a cargo jet flew low over the area at about the same time the part came down.
Photos on news station KOMO's website (is.gd/NJjJkY) show part of an identification plate on the object that has the word "aircraft" along with a serial number.
FAA officials aren't saying if they've located the plane that the part came from.
Information from: KOMO-TV, www.komotv.com
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