# SDR DALA2025120108747

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: November 26, 2025
- Submitted: December 1, 2025
- Operation: Air carrier
- Aircraft: [N510DE](https://openairdocs.org/aircraft/N510DE), registered now
- Make and model: Airbus A321-271NX
- Registry model: [Airbus A321-271NX](https://openairdocs.org/model/airbus-s-a-s-a321-271nx) (OpenAirDocs)
- Aircraft serial: 10828
- Aircraft time: 14,271 hours, 3,492 cycles
- System (JASC): [4990 · APU Oil System](https://openairdocs.org/jasc/4990)
- Part: Oil System
- Condition: Leaking
- Location: Apu
- Stage of operation: DE
- How discovered: O
- Nature of condition: K, B
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/DALA2025120108747

## Discrepancy

ON FINAL APPROACH - APPROX 7 MINS UNTIL TOUCHDOWN THE FA SMELLED 'DIRTY SOCK' IN AFT CABIN - FA WALKED FWD AND STATED SMELL STRONGER. SMELL WENT AWAY AT TOUCHDOWN.   FOUND APU GENERATOR LEAKING, REPLACED APU GENERATOR DRAIN PLUG SEAL. (LP 6581076, 6581079)

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