# SDR SWAA2017032012568

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 19, 2017
- Submitted: March 20, 2017
- Operation: Air carrier
- Aircraft: N708SW
- Make and model: Boeing 737-7H4
- Registry model: [Boeing 737-7H4](https://openairdocs.org/model/boeing-737-7h4) (OpenAirDocs)
- Aircraft serial: 27842
- Aircraft time: 64,763 hours, 38,642 cycles
- System (JASC): [2131 · Cabin Pressure Controller](https://openairdocs.org/jasc/2131)
- Part: Controller
- Part number: 71211997101AC
- Part serial: 0311931
- Condition: Faulty
- Location: Cabin Pressure
- Stage of operation: UK
- How discovered: O
- Nature of condition: O
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/SWAA2017032012568

## Discrepancy

DIVERSION, AT FL380, CABIN PRESSURIZATION RATE CYCLED FROM +2500 FPM TO -2000 FPM. DESCENT TO FL360, RATE CYCLED FROM +1800 TO -1000. DESCENT TO FL340. CABIN PRESSURIZATION RATE STABILIZED.  R&R NR 1 CABIN PRESSURE CONTROLLER PER AMM.

---
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.