# SDR UIEA200900004

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 29, 2008
- Submitted: January 2, 2009
- Operation: Air carrier
- Aircraft: [N412MC](https://openairdocs.org/aircraft/N412MC), registered now
- Make and model: Boeing 747-47UF
- Registry model: [Boeing 747-47UF](https://openairdocs.org/model/boeing-747-47uf) (OpenAirDocs)
- Aircraft serial: 30559
- Aircraft time: 39,042 hours, 5,909 cycles
- System (JASC): [3442 · Weather Radar System](https://openairdocs.org/jasc/3442)
- Part: Drive Assy
- Condition: Failed
- Location: Wx Radar Sys
- Stage of operation: CR
- How discovered: O
- Nature of condition: G
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/UIEA200900004

## Discrepancy

AIR TURN BACK, CREW PHONE PATCHED THAT THEY LOST NR 1 WX RADAR SYSTEM.  NR 2 WX RADAR SYSTEM WAS ALREADY ON DEFERRAL.  CREW RETURNED TO BKK.  MAINTENANCE REMOVED AND REPLACED RADAR DRIVE ALL SYSTEMS, OPS CHECKED OK.

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