# SDR 2009FA0001025

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 7, 2009
- Submitted: December 7, 2009
- Operation: General aviation
- Aircraft: [N27WP](https://openairdocs.org/aircraft/N27WP), registered now
- Make and model: Emb EMB-500
- Registry model: [EMB EMB-500](https://openairdocs.org/model/embraer-empresa-brasileira-de-emb-500) (OpenAirDocs)
- Aircraft serial: 50000058
- Aircraft time: 90 hours, 49 cycles
- System (JASC): [2133 · Pressure Regulator/Outflow Valve](https://openairdocs.org/jasc/2133)
- Part: Outflow Valve
- Part number: 21192864
- Part serial: 211928600017
- Condition: Defective
- Location: Zone 200
- Part time: 90 hours, 49 cycles
- Stage of operation: AP
- How discovered: O
- Nature of condition: J
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/2009FA0001025

## Discrepancy

DURING APPROACH AT 4000MSL THE PILOT LOST PRESSURIZATION CONTROL IN THE AUTO AND MANUAL MODE. A "MAX DIFF" CAS MESSAGE WAS DISPLAYED.

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