# SDR UALA2012091805254

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 17, 2012
- Submitted: September 20, 2012
- Operation: Air carrier
- Aircraft: [N212UA](https://openairdocs.org/aircraft/N212UA), registered now
- Make and model: Boeing 777222
- Aircraft serial: 30218
- Aircraft time: 44,490 hours, 9,583 cycles
- Engine: Pwa PW4077
- System (JASC): [3160 · Central Display](https://openairdocs.org/jasc/3160)
- Part: Display
- Part number: 4091900931
- Condition: Faulty
- Location: Cockpit
- Stage of operation: NR
- How discovered: O
- Nature of condition: O
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/UALA2012091805254

## Discrepancy

F/O NAV DISPLAY BLINKING ON AND OFF.  F/O NAV DISPLAY BLINKS, SWAPPED WITH CTR LOWER DISPLAY UNIT PER MEL, CB COLLARD.  REPLACED CENTER LOWER ND PER MM.

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