# SDR ASAA2022041438017

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 14, 2022
- Submitted: April 15, 2022
- Operation: Air carrier
- Aircraft: [N570AS](https://openairdocs.org/aircraft/N570AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35185
- Aircraft time: 55,465 hours, 16,561 cycles
- System (JASC): [2210 · Autopilot System](https://openairdocs.org/jasc/2210)
- Part: Dfgs
- Part number: 4082260939
- Part serial: 34094531
- Condition: Faulty
- Location: Cockpit
- Part time: 29 hours, 8 cycles
- Stage of operation: TX
- 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/ASAA2022041438017

## Discrepancy

ON PREFLT LNAV/VNAV WILL NOT ENGAGE. GROUNDED - YES. ACCOMPLISHED DFCS BITE REF B737-800 FIM 22-11 TASK 801 DFCS FAULTED 22-11063, ACCOMPLISHED FIM 22-11 TASK 817, MCP TEST FAULTED SAME 22-11063. REMOVED AND REPLACED MCP REF B737-800 AMM 22-11-34 ALL OPS CKD NML. ALL GND TESTS PASSED.

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