# SDR UALA2011112906559

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: November 28, 2011
- Submitted: December 8, 2011
- Operation: Air carrier
- Aircraft: [N777UA](https://openairdocs.org/aircraft/N777UA), registered now
- Make and model: Boeing 777222
- Aircraft serial: 26916
- Aircraft time: 66,986 hours, 12,220 cycles
- Engine: Pwa PW4077
- System (JASC): [3442 · Weather Radar System](https://openairdocs.org/jasc/3442)
- Part: Drive Unit
- Part number: MR4318252
- Condition: Failed
- Location: Wx Radar Sys
- Stage of operation: NR
- How discovered: 9
- Nature of condition: O
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/UALA2011112906559

## Discrepancy

WEATHER RADAR DISPLAY IS NOT PRESENT WHEN WXR SELECTED ON EFIS CONTROL PANEL.  REPLACED WEATHER RADAR DRIVE UNIT PER MM, TESTED OK.

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