# SDR DALA2025092206901

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 22, 2025
- Submitted: September 22, 2025
- Operation: Air carrier
- Aircraft: [N520DE](https://openairdocs.org/aircraft/N520DE), 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: 11176
- Aircraft time: 10,729 hours, 2,600 cycles
- Engine: Iae PW1133GAJM
- System (JASC): [7261 · Turbine Engine Oil System](https://openairdocs.org/jasc/7261)
- Part: Oil System
- Condition: Leaking
- Location: Nr 1 Engine
- 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/DALA2025092206901

## Discrepancy

ON DESCENT BELOW 11,000 FEET STRONG DIRTY SOCK SMELL DISSIPATED ON GROUND WHEN SWITCHING BLEEDS TO APU.   PERFORMED AND C/W MUST DO LOG 1210407 FOUND OIL PUDDLED AT BASE OF FAN HUB ON # 1 ENGINE REMOVED SPINNER AND FAN SHAFT COVER PER A321 AMM 72-11 INSTALLED NEW SEALS ON FAN SHAFT COVER AND SPINNER AND REINSTALLED PER A 321 AMM 72-11 PERFORMED WATERWASH. (LP 7330330)

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