# Incident 20111206029989I: Twentynine Palm, CA, December 6, 2011

- Type: FAA incident report (Accident/Incident Data System), as reported
- Date: December 6, 2011, 07:55 local time
- Place: Twentynine Palm, CA
- Damage: No damage
- Phase of flight: Cruise/Level Flight
- Operating rules: General operating rules (Part 91)
- Location: 34.1356° N, 116.0542° W: Placed by OpenAirDocs: center of Twentynine Palms, CA, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=34.1356&lon=-116.0542&mi=10
- Aircraft: NONE (not matched to a registry record)
- People aboard: 0
- Fatal injuries: 0
- Other injuries: 0
- FAA source: FAA Aviation Safety Information Portal (https://asip.faa.gov/)
- Page: https://openairdocs.org/incident/20111206029989I

## Narrative

As the FAA filed it, in capitals; the FAA replaces private details with ^PRIVACY DATA OMITTED^.

NASA806 A U2 WAS AT FL450 EASTBOUND.  DCM 3177 A G4 AT FL430 WAS WESTBOUND.  ATC ISSSUED MERGING TARGET INSTRUCTIONS WHEN THE AIRCRAFT WERE APPROXIMATETLY 10 MILES APART.  WHEN THE AIRCRAFT WERE APPROXIMATELY 4 MILES APART NASA806 MADE A TRANSMISSION THAT WAS DIFFICULT TO UNDERSTAND AND DESCENDED FROM ASSIGNED ALTITUDE.  ATC VECTORED DCM 3177 AWAY FROM NASA806.  DCM3177 REPORTED THE U2 IN SIGHT.  AT APPROXIMATELY FL270 NASA806 TRANSMISSIONS WERE CLEAR AND UNDERSTANDABLE. NASA806 ADVISED THAT HE HAD AN OXYGEN ISSUE, AND CONTINUED TO COMPLY WITH ATC INSTRUCTIONS.

From the FAA Accident/Incident Data System. Reports are matched to registry aircraft by N-number and event date, checked against the reported make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model. For accidents, the NTSB's own investigation is the fuller record.

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