# SDR AALA2009042900001

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 29, 2009
- Submitted: July 1, 2009
- Operation: Air carrier
- Aircraft: N578AA
- Make and model: Doug DC-9-82
- Registry model: [Doug DC-9-82](https://openairdocs.org/model/mcdonnell-douglas-dc-9-82) (OpenAirDocs)
- Aircraft serial: 53155
- Aircraft time: 52,695 hours, 26,973 cycles
- System (JASC): [2150 · Cabin Cooling System](https://openairdocs.org/jasc/2150)
- Part: Valve
- Condition: Defective
- Location: Ac Pack
- Stage of operation: CL
- How discovered: O
- Nature of condition: B
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AALA2009042900001

## Discrepancy

EWR - CREW REPORTED STRONG BURNING SMELL THROUGHOUT CABIN.  EMERGENCY DECLARED, RETURNED EWR WITHOUT INCIDENT.  AIRCRAFT REMOVED FROM SERVICE.  PERFORMED MCM CARD 21-96-01 CABON ODOR TROUBLESHOOTING.  REPLACED LEFT PILOT VALVE AND LEFT PACK PRESS REGULATING VALVE.  SYSTEM GROUND CHECK NORMAL OPERATION.

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