# SDR AALA20160328007

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 25, 2016
- Submitted: March 28, 2016
- Operation: Air carrier
- Aircraft: [N957AN](https://openairdocs.org/aircraft/N957AN), registered now
- Make and model: Boeing 737823
- Aircraft serial: 29541
- Aircraft time: 45,121 hours, 18,713 cycles
- System (JASC): [3610 · Pneumatic Distribution System](https://openairdocs.org/jasc/3610)
- Part: Control Valve
- Part number: 32895625
- Part serial: 6597
- Condition: Faulty
- Location: Zone 400
- Part time: 22,215 hours, 9,170 cycles
- 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/AALA20160328007

## Discrepancy

AIRCRAFT WAS GNDED.  AIR INTERRUPT, EMER NOT DECLARED, LANDING UNEVENTFUL & ACFT WAS NOT OVERWEIGHT.  DURING CLIMB COULD NOT EXCEED FL 200 WITHOUT RECEIVING PRESSURIZATION FAULT WARNING.  R & R PRE-COOLER CONTROL VLV IAW AMM 36-12-02.   LEAK & OPERATIONAL CHECKED 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.