# SDR 2004UALA01023

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: November 7, 2004
- Submitted: November 16, 2004
- Operation: Air carrier
- Aircraft: [N651UA](https://openairdocs.org/aircraft/N651UA), registered now
- Make and model: Boeing 767322
- Aircraft serial: 25389
- Aircraft time: 55,198 hours, 8,974 cycles
- Engine: Pwa PW4060
- System (JASC): [3460 · Flight Management Computing Hardware System](https://openairdocs.org/jasc/3460)
- Part: Computer
- Condition: Failed
- Location: Flt Manage
- Stage of operation: CL
- How discovered: O
- Nature of condition: O
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/2004UALA01023

## Discrepancy

RIGHT FMC CDU FAILED.  RIGHT CDU WAS REPLACED.  SHOP COULD NOT DUPLICATE CDU BLANKING DURING HOT, COLD AND VIBRATION OPERATION ON BENCH.  AS A PRECAUTION, SHOP REPLACED COMPONENTS A6A2Q7, A6A2Q8, A6A2U16, A2A2U45, A2A2U48 IN CDU.  THE CDU (MR40219-185) WAS REMOVED AND RETURNED TO THE SHOP.  SHOP FOUND THE DISPLAY WAS DIM BUT NOT BLANK AND REPLACED THE CRT AND YOKE ASSEMBLY.

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