# SDR AALA20170105007

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 1, 2017
- Submitted: January 5, 2017
- Operation: Air carrier
- Aircraft: [N967TW](https://openairdocs.org/aircraft/N967TW), registered now
- Make and model: Doug DC-9-83
- Registry model: [Doug DC-9-83](https://openairdocs.org/model/douglas-dc-9-83) (OpenAirDocs)
- Aircraft serial: 53617
- Aircraft time: 49,164 hours, 24,330 cycles
- System (JASC): [4990 · APU Oil System](https://openairdocs.org/jasc/4990)
- Part: Pressure Switch
- Part number: 3732052
- Condition: Leaking
- Location: Apu
- Stage of operation: UK
- How discovered: O
- Nature of condition: K, B
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AALA20170105007

## Discrepancy

AIRCRAFT WAS GROUNDED. SMOKE IN CABIN AFTER AIR CONDITIONING PACKS WERE RUNNING FOR APPROXIMATELY 20 MINUTES. REMOVED AND REPLACED AUXILIARY POWER UNIT LOW OIL PRESSURE SWITCH IAW AMM 49-90-03. OPERATIONAL AND LEAK CHECK GOOD.

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