# SDR ASAA2022090139755

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 1, 2022
- Submitted: September 2, 2022
- Operation: Air carrier
- Aircraft: [N478AS](https://openairdocs.org/aircraft/N478AS), registered now
- Make and model: Boeing 737
- Aircraft serial: 44105
- Aircraft time: 26,418 hours, 8,363 cycles
- System (JASC): [2210 · Autopilot System](https://openairdocs.org/jasc/2210)
- Part: Unknown
- Part number: SW43896
- Condition: Failed
- Location: Flight Deck
- 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/ASAA2022090139755

## Discrepancy

AURAL WAILER DOES NOT SOUND WHEN EITHER AUTOPILOT IS DISCONNECTED. GROUNDED - YES. REF B737-900 AMM 22-11-41, REMOVED/REPLACED F/O'S YOKE A/P DISENGAGE SWITCH.

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