# SDR AALA20110129TUL04

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 29, 2011
- Submitted: February 4, 2011
- Operation: Air carrier
- Aircraft: N9304C
- Make and model: Doug DC-9-83
- Registry model: [Doug DC-9-83](https://openairdocs.org/model/douglas-dc-9-83) (OpenAirDocs)
- Aircraft serial: 49530
- Aircraft time: 65,262 hours, 32,626 cycles
- System (JASC): [2163 · Cabin Temperature Sensor](https://openairdocs.org/jasc/2163)
- Part: Sensor
- Condition: Dirty
- Location: Cockpit & Cabin
- Stage of operation: DE
- How discovered: O
- Nature of condition: S
- Precautionary procedure: B, A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AALA20110129TUL04

## Discrepancy

DTW - CREW REPORTED BOTH PACKS FAILED ON DESCENT AND CABIN PRESSURE STARTED TO CLIMB.  CAPTAIN INITIATED EMERGENCY DESCENT TO 8000 FEET.  NO MASKS DEPLOYED.  EMERGENCY DECLARED FLIGHT LANDED DTW WITHOUT INCIDENT.  CLEANED FLIGHT DECK AND CABIN TEMP SENSOR.  SYSTEM GROUND CHECK NORMAL OPERATION.

---
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.