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UAP Insight significance score
UAP Characteristics
Evidence Types
Government Programs Referenced
Official Conclusion
Insufficient data for evaluation
Official Description
This file contains correspondence from Mr. Percy Wackey of Avalon, California to Mr. Kenneth Arnold of Boise, Idaho. Mr. Wackey relayed that his wife and another individual reported observing six objects over Catalina Island on the night of April 28, 1949. A handwritten annotation and contemporary documentation associated with the letter indicate a conclusion by the U.S. Air Force that the incident lacked sufficient data for evaluation.
Key Findings
Three-page file: a Project 10073 (Project Blue Book-era) record card, an AMC transmittal slip from the 17th District (Kirtland Field) to IAXS, and a handwritten letter dated May 1, 1949 from Percy E. Mackey of Avalon, Catalina Island to Kenneth Arnold. The letter relays that his wife and a school teacher saw six objects flying singly around 8 PM on April 28, 1949, and that four more were seen minutes later by three other family members. The official conclusion was 'Insufficient data for evaluation'.
Analyst Notes
Secondhand account: the letter writer did not himself see the objects; it relays what his wife, a school teacher, daughter and grandson reported. No duration, course, shape or description beyond count. No sensor data, photos or physical evidence. Conclusion was insufficient data, and mundane explanations were not explored in the document.
Extracted Entities
People
Agencies & Organizations
Locations
Aircraft & Objects
Dates
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AI analysis by claude-sonnet-5-5 · October 23, 2026