# SDR CALA2019081091333

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 8, 2019
- Submitted: August 10, 2019
- Operation: Air carrier
- Aircraft: [N39416](https://openairdocs.org/aircraft/N39416), registered now
- Make and model: Boeing 737924ER
- Aircraft serial: 37093
- Aircraft time: 38,859 hours, 13,423 cycles
- System (JASC): [2200 · Auto Flight System](https://openairdocs.org/jasc/2200)
- Part: Control Panel
- Part number: 8221567102
- Condition: Malfunctioned
- Location: Autopilot
- Stage of operation: CL
- How discovered: 9
- Nature of condition: O
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/CALA2019081091333

## Discrepancy

ON CLIMB, MCP ALTITUDE SELECTOR WENT TO 50000 AND WOULD NOT MOVE. UPDATED MAA CODE FIX USING VENDOR MAA SCREEN. PLEASE REPLACE MODE CONTROL PANEL IAW AMM 22-11-34-400-801. TEST IAW AMM 22-11-34-740-801.  REPLACED MODE CONTROL PANEL IAW AMM 22-11-34-400-801. TEST IAW AMM 22-11-34-740-801.

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