Documents / Official release
This Federal Aviation Administration record, released in 2023 as case 237UAP00037, logs a UFO report from 10 February 2019. The pilot of Alaska Airlines-coded flight ASA428, a Boeing 737-900 flying south at FL350 from Los Angeles and headed to Seattle, reported a slow-moving object with a white flashing light. The pilot estimated its altitude at FL400 to FL500 and said it was heading northeast. Seattle Center (ZSE) saw a primary radar target nearby moving at 20 knots, and WADS was notified. The report is closed.
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## PRIMARY CODE: OTHER Date: 07:55 02/10/2019 Status: Closed POD: DEN Callsign: ASA428 Reporting Facility: ZSE Aircraft: B739, BOEING, 737-900 Tail Number: Operator: ASA Origin: LAX Destination: New Destination: SEA Operator Type: Paged: NO REMARKS PIC reported a UFO while S bound at FL350. UFO had a white flashing light, slow moving, estimated at FL400 - FL500 NE bound. Lat/Long: 42:47N 121:42W. ZSE CPC observed a primary target in the vicinity showing 20 knots. WADS advised.
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Official release, from the nara collection. The PDF is mirrored here; the original link is above. The text was read from the page images by GLM-OCR; expect the odd misread word. 1 pages are in the text index: search them above, or from the library's search.