# SDR ASAA2023070143829

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 1, 2023
- Submitted: July 3, 2023
- Operation: Air carrier
- Aircraft: [N592AS](https://openairdocs.org/aircraft/N592AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35190
- Aircraft time: 55,629 hours, 16,529 cycles
- System (JASC): [2210 · Autopilot System](https://openairdocs.org/jasc/2210)
- Part: Unknown
- Part number: UNKNOWN
- Condition: Unknown
- Location: Unknown
- 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/ASAA2023070143829

## Discrepancy

UNABLE TO SELECT LNAV/VNAV IN THE MCP. GROUNDED - YES. PERFORMED A/C POWER DOWN FOR TROUBLESHOOTING REF B737-800 AMM 20-60-99.PERFORMED B737-800 FIM 22-11 TASK 801 DFCS BITE, AUTO TEST PASSED, NO CURRENT FAULTS. GROUND VERIFICATION SUCCESSFUL.

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