# SDR AALA20130616001

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: June 16, 2013
- Submitted: June 26, 2013
- Operation: Air carrier
- Aircraft: [N919AN](https://openairdocs.org/aircraft/N919AN), registered now
- Make and model: Boeing 737823
- Aircraft serial: 29520
- Aircraft time: 41,990 hours, 16,979 cycles
- System (JASC): [2131 · Cabin Pressure Controller](https://openairdocs.org/jasc/2131)
- Part: Controller
- Condition: Failed
- Location: Ac Bay
- Stage of operation: DE
- How discovered: O
- Nature of condition: J
- Precautionary procedure: B, G
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AALA20130616001

## Discrepancy

PRESSURIZATION LOSS DURING CRUISE. EMERGENCY DESCENT ACCOMPLISHED & O2 MASKS DEPLOYED ON DESCENT.  DESCENDING ON THE ARRIVAL CABIN ALT WARNING HORN ALONG WITH CABIN ALT WARNING LIGHT WERE ACTIVE.  EMERGENCY DECLARED FLIGHT LANDED MEX WITHOUT INCIDENT.  REPLACED LEFT PACK/ZONE TEMPERATURE CONTROLLER.  SYSTEM GROUND CHECKED NORMAL OPERATION.

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