# SDR 2023FA0000428

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 12, 2023
- Submitted: August 16, 2023
- Operation: General aviation
- Aircraft: [N735XJ](https://openairdocs.org/aircraft/N735XJ), registered now
- Make and model: Cessna 750
- Registry model: [Cessna 750](https://openairdocs.org/model/cessna-750) (OpenAirDocs)
- Aircraft serial: 7500293
- Aircraft time: 12,249 hours, 7,135 cycles
- System (JASC): [2130 · Cabin Pressure Control System](https://openairdocs.org/jasc/2130)
- Part: Control Module
- Part number: 67182741
- Part serial: 1038
- Condition: Defective
- Location: L Side Wall, Coc
- Part time: 12,249 hours
- Stage of operation: CL
- How discovered: V
- Nature of condition: J
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/2023FA0000428

## Discrepancy

CREW REPORTS DURING INITIAL CLIMB THEY NOTICED AN AMBER ALT MESSAGE POSTED BELOW 7K FT FOLLOWED BY A RED CABIN ALTITUDE MESSAGE AT 10K FT. REMOVED NC009 LOGIC MODULE P/N 6718274-1 S/N 1038 AND INSTALLED NEW MODULE P/N 6718274-1 S/N 32659173-1, OPERATIONAL CHECKS GOOD.

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