# SDR ASAA2020020383019

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 28, 2020
- Submitted: February 7, 2020
- Operation: Air carrier
- Aircraft: [N568AS](https://openairdocs.org/aircraft/N568AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35183
- Aircraft time: 49,660 hours, 14,948 cycles
- System (JASC): [2210 · Autopilot System](https://openairdocs.org/jasc/2210)
- Part: Control Unit
- Part number: 4082260939
- Part serial: 97091173
- Condition: Inoperative
- Location: Cockpit
- Part time: 14,557 hours, 5,232 cycles
- Stage of operation: NR
- How discovered: V
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2020020383019

## Discrepancy

MCP HEADING WINDOW UNREADABLE. GROUNDED - YES. REMOVED AND REPLACED DFCS MODE CONTROL PANEL REF B737-800 AMM 22-11-34/401. ACCOMPLISHED MCP INSTALLATION TEST AND THE LLM MAINTENANCE TEST FOR MCP REF AMM 22-11-34-740-801 AND AMM 22-11-34-400-801 STEP F.

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