# SDR 4USA2025111800762

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: November 14, 2025
- Submitted: November 18, 2025
- Operation: General aviation
- Aircraft: [N107AV](https://openairdocs.org/aircraft/N107AV), registered now
- Make and model: Cessna 750
- Registry model: [Cessna 750](https://openairdocs.org/model/cessna-750) (OpenAirDocs)
- Aircraft serial: 7500107
- Aircraft time: 13,395 hours, 7,706 cycles
- System (JASC): [5270 · Door Warning System](https://openairdocs.org/jasc/5270)
- Part: Proximity Switch
- Part number: B12EG08AN6X
- Condition: Defective
- Location: Zone 800
- Stage of operation: CL
- How discovered: O
- Nature of condition: J
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/4USA2025111800762

## Discrepancy

AFTER TAKEOFF, CABIN NOT PRESSURIZING. CABIN DOOR OPEN AND CABIN DOOR VENT OPEN MESSAGE APPEARED ON EICAS. CORRECTIVE ACTION: TROUBLESHOT SYSTEM. FOUND DEFECTIVE INNER HANDLE PROXIMITY SWITCH TO BE AT FAULT. REMOVED AND REPLACED PROXIMITY SWITCH. OPERATIONAL CHECKS SATISFACTORY AT THIS TIME.

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