# SDR 2022FA0000279

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: June 2, 2022
- Submitted: June 8, 2022
- Operation: General aviation
- Aircraft: [N850SX](https://openairdocs.org/aircraft/N850SX), registered now
- Make and model: Braero BAE125800A
- Aircraft serial: 258270
- Aircraft time: 12,315 hours, 8,298 cycles
- Engine: Garrtt TFE7315R
- Engine time: 12,202 hours, 8,187 cycles
- System (JASC): [2132 · Cabin Pressure Indicator](https://openairdocs.org/jasc/2132)
- Part: None
- Condition: None
- Stage of operation: CL
- How discovered: V
- Nature of condition: J
- Precautionary procedure: B, A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/2022FA0000279

## Discrepancy

DURING CLIMB PASSING FL 355 THE "CABIN ALTITUDE" LIGHT CAME ON WITH DIFFERENTIAL PRESSURE INDICATOR SHOWING ZERO. CABIN DID NOT LOSE PRESSURIZATION; HOWEVER THE CREW FOLLOWED THE CHECKLIST DECLARED EMERGENCY, DESCENDED TO LOWER ALTITUDE AND RETURNED TO THE DEPARTURE AIRPORT. UPON GROUND TEST NO ISSUES WERE FOUND WITH THE PRESSURIZATION INDICATION SYSTEM.

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