# SDR SWAA990264

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 15, 1999
- Submitted: March 26, 2000
- Operation: Air carrier
- Aircraft: [N354SW](https://openairdocs.org/aircraft/N354SW), registered now
- Make and model: Boeing 737-3H4
- Registry model: [Boeing 737-3H4](https://openairdocs.org/model/boeing-737-3h4) (OpenAirDocs)
- Aircraft serial: 25219
- System (JASC): [2130 · Cabin Pressure Control System](https://openairdocs.org/jasc/2130)
- Part: Valve
- Part number: 327375
- Condition: Failed
- Location: Cabin
- Stage of operation: CR
- Nature of condition: J
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/SWAA990264

## Discrepancy

ON TAKEOFF WHEN GEAR CAME UP LOUD RUMBLE OCCURED AND PRESSURIZATION BEGAN +- 500 - 1000 FPM RATE OF CLIMB.  AIRCRAFT RETURNED TO ABQ.  REMOVED AND REPLACED AUTOMATIC FLOW CONTROL VALVE PER M/M.  PRESSURIZED MANUALLY, VALVE OPS CK NORMAL IAW MM.

---
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.