# SDR USA2002F00087

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 28, 2002
- Submitted: September 18, 2002
- Operation: Air carrier
- Aircraft: N426US
- Make and model: Boeing 737-4B7
- Registry model: [Boeing 737-4B7](https://openairdocs.org/model/boeing-737-4b7) (OpenAirDocs)
- Aircraft serial: 24548
- System (JASC): [2197 · Air Conditioning System Wiring](https://openairdocs.org/jasc/2197)
- Part: Wire
- Condition: Faulty
- Location: Control Panel
- 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/USA2002F00087

## Discrepancy

ON CLIMB OUT, AIRCRAFT ENCOUNTERED A PRESSURIZATION PROBLEM AT 6,000 FT.  CREW STOPPED THE CLIMB AT 7,000 FT AND RETURNED TO FIELD AT WHERE THE FLIGHT LANDED WITHOUT FURTHER INCIDENT.  NO EMERGENCY WAS DECLARED AND NO OXYGEN MASKS WERE DEPLOYED.  MAINTENANCE REPAIRED WIRING IN BACK OF THE OVERHEAD PRESSURIZATION PANEL.  ALSO, REMOVED AND REPLACED AFT OUTFLOW VALVE AND P5-6 OVERHEAD PRESSURIZATION PANEL FOR TROUBLESHOOTING PURPOSES.  ACCOMPLISHED OPERATIONAL TEST OF PRESSURIZATION SYSTEM PER MM.  OPERATIONAL TEST GOOD.

---
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.