# SDR ASAA2017030119982

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 1, 2017
- Submitted: March 3, 2017
- Operation: Air carrier
- Aircraft: [N516AS](https://openairdocs.org/aircraft/N516AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 39044
- Aircraft time: 31,167 hours, 9,491 cycles
- System (JASC): [3460 · Flight Management Computing Hardware System](https://openairdocs.org/jasc/3460)
- Part: Fmc
- Condition: Malfunctioned
- Location: Nr 1
- 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/ASAA2017030119982

## Discrepancy

NR 1 FMC SCREEN STROBING BRIGHT TO  DIM WHEN DISPLAY IS DIMMED.  ACFT GROUNDED.  PERFORMED FIM 34-61, TASK 803 WITH VARYING DIMMING RHEOSTAT SETTINGS,  VARYING LIGHT INTENSITY ON CDU LIGHT SENSORS PRODUCED NO DISCREPANCIES. INTERMITTENT FAULT. NO HISTORY LAST 90 DAYS. GROUND VERIFIICATION TESTED GOOD.

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