# SDR USAABB97041

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 10, 1997
- Submitted: March 26, 2000
- Operation: Air carrier
- Aircraft: N630AU
- Make and model: Boeing 757-2B7
- Registry model: [Boeing 757-2B7](https://openairdocs.org/model/boeing-757-2b7) (OpenAirDocs)
- Aircraft serial: 27808
- System (JASC): [2133 · Pressure Regulator/Outflow Valve](https://openairdocs.org/jasc/2133)
- Part: Outflow Valve
- Part number: 60683218
- Condition: Failed
- Location: Aft Fuselage
- Part time: 7,109 hours
- Stage of operation: CL
- Nature of condition: J
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/USAABB97041

## Discrepancy

BOS - FLT 1049 - AFTER TAKEOFF, CREW RECEIVED THE EICAS MESSAGES 'CABIN ALT INOP', 'CABIN ALT AUTO 1' AND 'CABIN ALT AUTO 2'.  CREW COULD NOT CONTROL PRESSURIZATION IN MANUAL.  FLIGHT RETURNED TO BOS AND LANDED WITH NO FURTHER INCIDENT.  MAINTENANCE REPLACED THE OUTFLOW VALVE/ACTUATOR ASSEMBLY.  (X)

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.