# SDR ASAA2017120822825

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 8, 2017
- Submitted: December 12, 2017
- Operation: Air carrier
- Aircraft: [N589AS](https://openairdocs.org/aircraft/N589AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35686
- Aircraft time: 38,605 hours, 11,669 cycles
- System (JASC): [2210 · Autopilot System](https://openairdocs.org/jasc/2210)
- Part: Unknown
- Condition: Unknown
- Location: Autopilot
- Stage of operation: NR
- How discovered: 9
- Nature of condition: O
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2017120822825

## Discrepancy

VERTICAL SPEED UP/DOWN WHEEL INOPERATIVE WITH AUTOPILOT "B", FULLY FUNCTIONAL WITH AUTOPILOT "A". GROUNDED - YES. PERFORMED B737-800 FIM 22-11 TASK 801, AUTOPILOT 'B' LAND VERIFY. AUTO, INTERACTIVE AND SURFACE TESTS PASSED. NO FAULT NOTED. NO HISTORY IN 60 DAYS. OPS NORMAL. (DFCS). CLEARED MEL 22-14C.

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