# SDR DALA2025101507525

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 13, 2025
- Submitted: October 15, 2025
- Operation: Air carrier
- Aircraft: [N381DZ](https://openairdocs.org/aircraft/N381DZ), registered now
- Make and model: Airbus A321-211
- Registry model: [Airbus A321-211](https://openairdocs.org/model/airbus-a321-211) (OpenAirDocs)
- Aircraft serial: 8859
- Aircraft time: 20,758 hours, 8,907 cycles
- System (JASC): [4920 · APU Core Engine](https://openairdocs.org/jasc/4920)
- Part: Intake
- 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/DALA2025101507525

## Discrepancy

FA'S REPORTED DIRTY SOCK/MUSTY SMELL ODOR THROUGHOUT CABIN FROM TOP OF DESCENT TO TOUCH DOWN. NOTHING DETECTED IN COCKPIT.   FOUND INTAKE AREA CONTAMINATED WITH OIL AND EVIDENCE COMING FROM COMPRESSOR. APU TO BE REPLACED. (LP 7781906, 7781907)

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