# SDR ASAA2017101922269

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 19, 2017
- Submitted: October 23, 2017
- Operation: Air carrier
- Aircraft: [N590AS](https://openairdocs.org/aircraft/N590AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35687
- Aircraft time: 37,354 hours, 11,283 cycles
- System (JASC): [2210 · Autopilot System](https://openairdocs.org/jasc/2210)
- Part: Switch
- Part number: SW43896
- Condition: Failed
- Location: Autopilot
- Stage of operation: NR
- How discovered: O
- Nature of condition: J
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2017101922269

## Discrepancy

AUTOPILOT B AND CWS B INOPERATIVE.  ACFT GROUNDED.  LAST LEG FCC B FAULTS,  FO AUTOPILOT DISC SWITCH FCCB J1B K07. IAW WDM 22-11-12, PG 3, SH 2, GOOD 28 VOLTS AT TB806 X A14 - 0 VOLTS AT XA13. REMOVED & REPLACED THE CAPTAIN'S AUTOPILOT DISCONNECT SWITCH S231 IAW AMM 22-11-41. OPS NORMAL.

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