# SDR DALA2026040802231

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 7, 2026
- Submitted: April 8, 2026
- Operation: Air carrier
- Aircraft: [N373NW](https://openairdocs.org/aircraft/N373NW), registered now
- Make and model: Airbus A320-212
- Registry model: [Airbus A320-212](https://openairdocs.org/model/airbus-industrie-a320-212) (OpenAirDocs)
- Aircraft serial: 1641
- Aircraft time: 69,765 hours, 33,494 cycles
- System (JASC): [4900 · Airborne Auxiliary Power Unit (APU) System](https://openairdocs.org/jasc/4900)
- Part: Apu
- Condition: Contaminated
- Location: Zone 100
- Stage of operation: NR
- 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/DALA2026040802231

## Discrepancy

DIRTY SOCK ODOR AFTER APU BLEED SELECTED. OPENED APU COMPARTMENT, SAW SIGNS OF OIL ON APU AND APU DOOR IAW AMM 49-00. RUN APU AND STILL GETTING ODOR AT HIS TIME. INSPECTED APU ACCESS DOOR AND COMPARTMENT FOUND NO EVIDENCE OF CONTAMINATION.  REF MD LOG 1531675 & APU REPLACEMENT ON LOG 1531804. (LP: 8423672) AIRCRAFT WAS GROUNDED.

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