# SDR ASAA2021111336581

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: November 13, 2021
- Submitted: November 16, 2021
- Operation: Air carrier
- Aircraft: [N531AS](https://openairdocs.org/aircraft/N531AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35199
- Aircraft time: 40,571 hours, 11,758 cycles
- System (JASC): [2210 · Autopilot System](https://openairdocs.org/jasc/2210)
- Part: Unknown
- Part number: UNKNOWN
- Condition: Unknown
- Location: Unknown
- Stage of operation: LD
- 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/ASAA2021111336581

## Discrepancy

ATTEMPTED AUTOLAND WAS UNSUCCESSFUL WITH APP ARMED AND AUTOPILOT A ENGAGED, AUTOPILOT B WOULD NOT ENGAGE. GROUNDED - YES. FOUND C/B FCC B ENGAGE INTERLOCK C/B OUT ON P6-2. RESET REF B737-800 AMM 20-60-01 AND WD 22-11-12 PG 3. C/B REMAINED SET. FCC B OPS NML REF AMM 22-11-00. LAND VERIFY TEST PASS REF AMM 22-11-00. ETOPS GND VERIFICATION TEST SUCCESSFUL.

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