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UAP / Balloon Incident
Single-Record File

FAA Report 237UAP00154: Large Balloon Sighting near McCook

Single-Record File: Only one inspectable record is attached. It documents a source or allegation but cannot independently corroborate the broader claim.
OverviewEvidenceTimelineAnalysisSources
2023-02-03
15 NM Southwest of McCook, Nebraska, USA
9/10
2/10
A pilot reported a large balloon at approximately 50,000 feet while flying at 43,000 feet.
low

Investigative Assessments

"The reported claim remains worth testing against the record: A pilot reported a large balloon at approximately 50,000 feet while flying at 43,000 feet. The strongest documented reasons to keep the file open are: FAA SKYWATCH Incident Form 237UAP00154: Documents a pilot report of A pilot reported a large balloon at approximately 50,000 feet while flying at 43,000 feet.. Key unresolved lead: Was this balloon the same object reported by flights in the adjacent sectors?"
"Evidentiary limitations: low Note that: FAA SKYWATCH Incident Form 237UAP00154 fails to support: The operational log does not contain physical telemetry, radar recordings, or photos to independently verify the nature of the object.."

Case Summary

An intake summary of FAA operational log 237UAP00154 recording an aircrew reporting an unidentified aerial phenomenon. A pilot reported a large balloon at approximately 50,000 feet while flying at 43,000 feet. This pilot synopsis is an intake summary requiring source-by-source verification.

Evidence Locker

1 inspectable evidence item. Claims and source findings are kept separate.

FAA incident report Local copy hash-verified

FAA SKYWATCH Incident Form 237UAP00154

Analyst rating: Primary operational record of an aircrew report and the FAA's contemporaneous assessment.

“Aircraft reported a large balloon off the 12 o'clock while W bound at FL430, 15NM SW of MCM. The balloon was at approximately FL500 and below.”
Record locationPage 1
Evidence classFAA operational incident record
Relationship to claimPrimary document recording the pilot's intake report.
Authenticity assessmentHigh for document authenticity. The one-page FAA form was visually checked against the NARA PDF.
What this supportsDocuments a pilot report of A pilot reported a large balloon at approximately 50,000 feet while flying at 43,000 feet.
What it does not supportThe operational log does not contain physical telemetry, radar recordings, or photos to independently verify the nature of the object.
ProvenanceOfficial NARA UAP bulk-download record, hash-registered in the Casebook manifest and served from the read-only VPS corpus mount.
Chain of custodyAircrew report -> FAA SKYWATCH incident form -> FAA transfer to NARA Record Group 615 -> NARA bulk archive -> Casebook.
Open Document (Local PDF Document) Download Copy Canonical Agency Record

Documented Timeline

Not documented: No source-verified chronology has been assembled.

Named Participants and Roles

Not documented: Named participants and roles have not been source-verified.

Contradictions and Record Conflicts

Not documented: Record conflicts have not been analyzed.

Conventional Explanations

Not documented: Conventional explanations have not been evaluated against evidence.

Missing Evidence

Not documented: The evidence gap itself has not yet been fully inventory.

What Remains Unresolved

Not documented: No source-level unresolved findings have been established.

Investigative Hypotheses

  • A weather balloon operating at its ceiling altitude.
  • A high-altitude scientific platform.
  • A spy balloon drifting east.

Open Questions

  • Was this balloon the same object reported by flights in the adjacent sectors?
  • Why was no transponder active on the balloon's instrument package?
  • What air currents were active at 50,000 feet at the time?

Archival Landing Pages and Evidence Corpus

NARA Record Group 615, FAA UAP Records

Official Bulk Archive

External URL: https://catalog.archives.gov/id/493468575