June 20th, 2015
Seattle, Washington - PRELIM INFO FROM FAA OPS SEA UAS INCIDENT 2009P S46 ADVISED HORIZON 423 DEHAVILLAND DH8D
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PRELIM INFO FROM FAA OPS: SEA/UAS INCIDENT/2009P/S46 ADVISED HORIZON 423, DEHAVILLAND DH8D, REPORTED POSSIBLE UAS AT 5,500 FEET 14 SE SEA. DESCRIPTION OF UAS NOT REPORTED. LEO TO BE NOTIFIED.