# SDR ASAA2019050729265

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 7, 2019
- Submitted: May 9, 2019
- Operation: Air carrier
- Aircraft: [N469AS](https://openairdocs.org/aircraft/N469AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 41702
- Aircraft time: 18,907 hours, 6,233 cycles
- System (JASC): [2210 · Autopilot System](https://openairdocs.org/jasc/2210)
- Part: Control Panel
- Part number: 8221567102
- Part serial: 41FG36
- Condition: Failed
- Location: Cockpit
- Part time: 14,275 hours, 4,724 cycles
- Stage of operation: AP
- How discovered: O
- Nature of condition: O
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2019050729265

## Discrepancy

MODE CONTROL PANEL AIRSPEED CONTROL KNOB IN APP MODE ON FINAL APPROACH WAS INTERMITTENTLY LOCKED UP - BOTH TIMES EVENTUALLY ALLOWED US TO CONTROL THE IAS. GROUNDED - YES. R & RD DFCS MODE CONT PNL PER AMM 22-11-34 C/B'S PULLED/TAGGED AND UNTAGGED/RESET (9). SYS OPS CKS NML PER SAME.

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