# SDR 4DPA2024060700001

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: June 7, 2024
- Submitted: June 12, 2024
- Operation: Air carrier
- Aircraft: [N949JX](https://openairdocs.org/aircraft/N949JX), registered now
- Make and model: Emb EMB-145LR
- Registry model: [EMB EMB-145LR](https://openairdocs.org/model/embraer-emb-145lr) (OpenAirDocs)
- Aircraft serial: 145639
- Aircraft time: 42,612 hours, 33,545 cycles
- System (JASC): [2133 · Pressure Regulator/Outflow Valve](https://openairdocs.org/jasc/2133)
- Part: Outflow Valve
- Part number: 2097K011100
- Part serial: F1958
- Condition: Failed
- Location: Cabin Pressure
- Stage of operation: CR
- How discovered: O
- Nature of condition: J
- Precautionary procedure: B, A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/4DPA2024060700001

## Discrepancy

CREW REPORTED-CRUISING AT FL360 WE FELT OUR EARS POP DUE TO A CABIN PRESSURIZATION ISSUE FOLLOWED BY A MASTER CAUTION AND OBSERVED THE CAB ALT IN RED SHOWING 13500. IMMEDIATELY DECLARED AN EMERGENCY AND BEGAN A RAPID DESCENT TO 14000 WHILE TAKING MANUAL CONTROL OF THE CABIN PRESSURIZATION. THE BEST RATE WE COULD OBTAIN WAS -450 FPM UNTIL IT STABILIZED AT 6500 CABIN ALTITUDE. NO OTHER ISSUES DURING DESCENT TO LANDING AT SDL. CORR ACTION- MX TROUBLESHOT TO BAD OUTFLOW VALVE. REMOVED AND REPLACED ELECTRO-PNEUMATIC OUTFLOW VALVE OPS CHECK GOOD, NO DEFECTS NOTED.

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