SKYWATCH INCIDENT REPORT PRIMARY CODE: OTHER Date: 04:58 02/10/2019 Callsign: EWG1113 Origin: EDDL Status: Closed Aircraft: A333, AIRBUS, A-330-300 Destination: POD: DEN Tail Number: New Destination: EWR Reporting Facility: WOC Operator: EWG Operator Type: Paged: NO REMARKS ZBW reported that PICobserved a UFO withflashing lights at FL500 descending rapidly. ACFT was E bound at FL390 90NM SE of BOS. SKYWATCH INCIDENT REPORT | DATE: 2019-02-10T04:58 | POD: DEN | PAGE 1 of 1