# SDR ASAA2016032016022

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 20, 2016
- Submitted: March 22, 2016
- Operation: Air carrier
- Aircraft: [N506AS](https://openairdocs.org/aircraft/N506AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35690
- Aircraft time: 29,948 hours, 9,149 cycles
- System (JASC): [2210 · Autopilot System](https://openairdocs.org/jasc/2210)
- Part: Control Panel
- Part number: 4082260939
- Part serial: 98031336
- Condition: Failed
- Location: Cockpit
- Part time: 43,454 hours, 22,588 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/ASAA2016032016022

## Discrepancy

MCP PANEL BACKLIGHTING MAKES DIFFICULT TO SEE DIGITS, ESPECIALLY ALTITUDE SETTING. ACFT GROUNDED.  R & R DFCS MODE CONTROL PANEL IAW AMM 22-11-34.  SYS OPS CHECKS NORMAL IAW SAME, GROUND VERIFICATION SUCCESSFUL.  DFCS BITE GROUP NR 32 & 49 AND HGS SENSOR TEST IAW AMM 34-36-00 PASS, ACFT REMAINS CAT III AUTOLAND/HGS.

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