# SDR AALA20050588

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 12, 2005
- Submitted: September 13, 2005
- Operation: Air carrier
- Aircraft: [N7509](https://openairdocs.org/aircraft/N7509), registered now
- 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: 49803
- System (JASC): [4920 · APU Core Engine](https://openairdocs.org/jasc/4920)
- Part: O-Ring
- Condition: Inoperative
- Location: Thermostat Valve
- Stage of operation: CL
- How discovered: V
- Nature of condition: B
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AALA20050588

## Discrepancy

EWR  INFLIGHT T1147/11SEP ACRID SMOKE IN CABIN IMMEDIATELY AFTER TAKEOFF.  PACKS SHUT OFF AND LANDED EWR WITHOUT INCIDENT.  REPLACED O-RING AT THERMOSTAT VALVE OF APU.  PERFORMED PACK BURN OUT AND ENGINE HIGH POWER RUN UP WITH NO SMOKE NOTED.  SYSTEM GROUND CHECKED NORMAL OPERATION.

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