# SDR AALA20100126DFW01

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 26, 2010
- Submitted: October 28, 2010
- Operation: Air carrier
- Aircraft: N562AA
- Make and model: Doug DC-9-83
- Registry model: [Doug DC-9-83](https://openairdocs.org/model/douglas-dc-9-83) (OpenAirDocs)
- Aircraft serial: 49344
- Aircraft time: 73,458 hours, 32,564 cycles
- System (JASC): [2120 · Air Distribution System](https://openairdocs.org/jasc/2120)
- Part: Line
- Condition: Failed
- Location: Ac System
- Stage of operation: CR
- How discovered: O
- Nature of condition: G
- Precautionary procedure: G, B
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AALA20100126DFW01

## Discrepancy

DFW - CREW REPORTED DURING DESCENT BOTH PACKS FAILED.  CREW DONNED MASKS AND CABIN O2 MASKS DEPLOYED.  EMERGENCY DESCENT TO 10,000.  EMERGENCY DECLARED LANDED DFW WITHOUT INCIDENT.  AIRCRAFT REMOVED FROM SERVICE.  REPLACED LEFT PILOT VALVE PRESS REGULAR LINE AND PILOT PSI REGULATOR VALVE LINE.  SYSTEM GROUND CHECKED NORMAL OPERATION.

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