# SDR IPXA2024080857668

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 8, 2024
- Submitted: August 12, 2024
- Operation: Air carrier
- Aircraft: [N309UP](https://openairdocs.org/aircraft/N309UP), registered now
- Make and model: Boeing 767-34AF
- Registry model: [Boeing 767-34AF](https://openairdocs.org/model/boeing-767-34af) (OpenAirDocs)
- Aircraft serial: 27740
- Aircraft time: 67,877 hours, 23,131 cycles
- System (JASC): [2133 · Pressure Regulator/Outflow Valve](https://openairdocs.org/jasc/2133)
- Part: Outflow Valve
- Condition: Faulted
- Stage of operation: DE
- 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/IPXA2024080857668

## Discrepancy

*** EMERGENCY DECLARED *** SDR FILED OPEN *** FL 370 CABIN ALT EICAS MESSAGE MODE SELECT WAS AUTO 2 WITH BOTH PACKS IN AUTO. CABINDIFFERENTIAL WAS APPROXIMATELY 6PSI AND CABIN ALTITUDE INDICATED 11,00-12000 FEET (SEE PHOTO FOR REMAINING WRITE-UP) PERFORMED FIM 21-31 FAULT TREE 803. NO FAULTS NOTED ON EITHER CABIN PRESSURE CONTROLLER. R&R CABIN PRESSURE SELECTOR PANEL PER AMM 21-31-01 AND #2 OUTFLOW VALVE ACTUATOR PER AMM 21-31-05, PRECAUTIONARY PER FIM. OPS CHECK OF BOTH WERE NORMAL.

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