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PRIMARY CODE: UNIDENTIFIED AERIAL PHENOMENON
Date: 15:39 02/03/2023
Status: Closed
POD: DEN
Callsign: UAL700
Aircraft: B772
Reporting Facility: ZKC
Tail Number:
Operator: UAL
Origin: IAD
Destination: SFO
New Destination:
Operator Type: Commercial
Paged: NO
REMARKS
Aircraft reported a large balloon off the right side while N bound at FL400, 10NM W of STJ. The balloon was at approximately FL500 and above.