# SDR ASAA2023092445270

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 24, 2023
- Submitted: September 25, 2023
- Operation: Air carrier
- Aircraft: [N433AS](https://openairdocs.org/aircraft/N433AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 41704
- Aircraft time: 36,773 hours, 11,637 cycles
- System (JASC): [2210 · Autopilot System](https://openairdocs.org/jasc/2210)
- Part: Display
- Part number: 4082260939
- Part serial: 99071824
- Condition: Defective
- Location: Control Panel
- Part time: 75,943 hours, 31,083 cycles
- Stage of operation: NR
- How discovered: V
- Nature of condition: O
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2023092445270

## Discrepancy

HEADING WINDOW ON MCP PARTIALLY UNREADABLE. GROUNDED - YES. REMOVED AND REPLACED MCP REF B737-900 AMM 22-11-34. REQUIRED LLM TEST PASSED.

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