# SDR ASAA2018110126708

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: November 1, 2018
- Submitted: November 6, 2018
- Operation: Air carrier
- Aircraft: [N589AS](https://openairdocs.org/aircraft/N589AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35686
- Aircraft time: 41,830 hours, 12,620 cycles
- System (JASC): [2130 · Cabin Pressure Control System](https://openairdocs.org/jasc/2130)
- Part: Control Module
- Part number: 8243921003
- Part serial: 2007089503
- Condition: Intermittent
- Location: Cabin Pressure
- Part time: 35,711 hours, 12,427 cycles
- 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/ASAA2018110126708

## Discrepancy

FLT ALT SELECTOR KNOB INTERMITTENTLY SELECTS DESIRED ALTITUDE. GROUNDED - YES. REMOVED AND REPLACED CABIN PRESSURE CONTROL MODULE, OPS CK GOOD REF B737-800 AMM 21-31-02.

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