# SDR ASAA2021103136476

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 31, 2021
- Submitted: November 3, 2021
- Operation: Air carrier
- Aircraft: [N428AS](https://openairdocs.org/aircraft/N428AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 36353
- Aircraft time: 20,774 hours, 6,581 cycles
- System (JASC): [2210 · Autopilot System](https://openairdocs.org/jasc/2210)
- Part: Control Panel
- Part number: 8221567102
- Part serial: 14JJM
- Condition: Inoperative
- Part time: 62,537 hours, 20,962 cycles
- Stage of operation: IN
- 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/ASAA2021103136476

## Discrepancy

VERTICAL SPEED INOP AUTOPILOT A. GROUNDED - YES. REMOVED AND INSTALLED SERVICEABLE AUTO PILOT MCP, SYS OPS CHECK GOOD IAW B737-900 AMM 22-11-34-000-801, 22-11-34-400-801 AND 22-11-34-740-801, SEE LOG PAGE 60289052 FOR MEL 22-99D SYSTEM IS CURRENTLY ON.

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