# SDR ASAA2016031415904

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 14, 2016
- Submitted: March 16, 2016
- Operation: Air carrier
- Aircraft: [N577AS](https://openairdocs.org/aircraft/N577AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35186
- Aircraft time: 34,530 hours, 10,279 cycles
- System (JASC): [2210 · Autopilot System](https://openairdocs.org/jasc/2210)
- Part: Control Panel
- Part number: 8221567102
- Part serial: 1D8BB
- Condition: Failed
- Location: Mod
- Part time: 43,610 hours, 16,321 cycles
- 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/ASAA2016031415904

## Discrepancy

MODE CONTROL PANEL AMBIENT LIGHT SENSOR WILL NOT DIM MCP DISPLAY.  ACFT GROUNDED. REPLACED MODE CONTROL PANEL.  ALL OPS NORMAL AMM 22-11-34.  ACCOMPLISHED DFCS LRU INTERFACE TEST FOR MCP, BITE GROUP NR 32,  LAND VERIFY TEST, BITE GROUP 49, AND HGS SENSOR TEST FOR FCC/AT, REF AMM 34-36-00.  ALL TEST PASS. ACFT REMAINS CAT III A AUTOLAND AND HGS QUALIFIED.

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