# SDR DALA2018110406491

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: November 4, 2018
- Submitted: November 7, 2018
- Operation: Air carrier
- Aircraft: N317US
- Make and model: Airbus A320-211
- Registry model: [Airbus A320-211](https://openairdocs.org/model/airbus-industrie-a320-211) (OpenAirDocs)
- Aircraft serial: 197
- Aircraft time: 82,602 hours, 37,509 cycles
- System (JASC): [4990 · APU Oil System](https://openairdocs.org/jasc/4990)
- Part: Cooling Fan
- Condition: Leaking
- Location: Apu
- Stage of operation: DE
- 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/DALA2018110406491

## Discrepancy

BURN TYPE SMELL ON DESCENT, TRANSITIONING TO A DIRTY SOCK SMELL AROUND 14,000 AND LOWER AFTER IDLE DESCENT SMELL GOT HEAVIER PER PILOTS. AFT OF ROW 25-29. FOUND OIL FROM COOLING FAN DOWN TO GENERATOR AND IN COMPRESSOR INLET IN APU COMPARTMENT. CHANGED APU ON WORK CARD 4900-9001.

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