# SDR ASAA2021112336717

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: November 23, 2021
- Submitted: November 30, 2021
- Operation: Air carrier
- Aircraft: [N581AS](https://openairdocs.org/aircraft/N581AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35188
- Aircraft time: 51,328 hours, 15,241 cycles
- System (JASC): [2210 · Autopilot System](https://openairdocs.org/jasc/2210)
- Part: Control Panel
- Part number: 8221567102
- Part serial: 177H5G
- Condition: Faulty
- Location: Flight Deck
- Part time: 45,670 hours, 13,876 cycles
- Stage of operation: NR
- How discovered: O
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2021112336717

## Discrepancy

AUTO PILOT B WILL NOT ENGAGE. GROUNDED - YES. REMOVED & REPLACED MCP REF B737-800 AMM 22-11-34. PERFORMED DFCS OPS TEST, REF AMM 22-11-00. PERFORMED ADDITIONAL TESTS FOR GROUP 11 AND GROUP 15. A/C RELEASED FROM MEL 22-1F. LAND VERIFY ACCOMPLISHED REF AMM 22-11-00-700-801. ALL TESTS PASSED. A/C RETURNED TO CAT III STATUS.

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