# SDR DALA2025101307453

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 13, 2025
- Submitted: October 13, 2025
- Operation: Air carrier
- Aircraft: [N336NW](https://openairdocs.org/aircraft/N336NW), registered now
- Make and model: Airbus A320-212
- Registry model: [Airbus A320-212](https://openairdocs.org/model/airbus-industrie-a320-212) (OpenAirDocs)
- Aircraft serial: 355
- Aircraft time: 96,129 hours, 44,509 cycles
- System (JASC): [4920 · APU Core Engine](https://openairdocs.org/jasc/4920)
- Part: Inlet
- Condition: Contaminated
- Location: Apu
- Stage of operation: TX
- How discovered: O
- Nature of condition: C, B
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/DALA2025101307453

## Discrepancy

ON THE GOURND, AFTER 5 MIN OF APU RUNNING, DIRTY SOCK ODOR/SMELL PRESENT AFTER SELECTING APU BLEED ON. SMELL SEEMS TO DISSAPATE AFTER SELECTING BLEED OFF.  PERFORMED SMOKE AND FUME T/S IAW A320 AMDS WORKCARD # 0550-2002. FOUND SOURCE TO BE APU INLET DUCT CONTAMINATION. PERFORMED APU DUCT DECONTAMINATION IAW AMM 36-10. NO ODOR PRESENT. OK FOR SVC. (LP: 7404140)

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