# SDR DALA2026100505480

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 4, 2026
- Submitted: October 5, 2026
- Operation: Air carrier
- Aircraft: [N502DX](https://openairdocs.org/aircraft/N502DX), 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: 10467
- Aircraft time: 19,443 hours, 4,695 cycles
- System (JASC): [7261 · Turbine Engine Oil System](https://openairdocs.org/jasc/7261)
- Part: Fan
- Condition: Contaminated
- Location: Engine
- Stage of operation: IN
- How discovered: O
- Nature of condition: K, B
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/DALA2026100505480

## Discrepancy

FWD FA'S REPORTED DIRTY SOCK SMELL FROM TOD UNTIL LANDING. CORRECTIVE ACTION: ENGINES 1 AND 2 FOUND MINOR ACCUMULATION OF OIL AT THE FAN SHAFT COVER SEAL. REPLACED FAN SHAFT COVER SEALS, C/W LEVEL B DECONTAMINATION. EVIDENCE OF APU INLET AND/OR PNEUMATIC SYSTEM CONTAMINATION FROM THE APU IS SUSPECT, FWD APU TO MEL 49-10-01A. LATER, INSPECTED APU DUCTING, INLET AND COMPARTMENT NO OIL RESIDUE FOUND. (LP 9130458, 1846741, 9130459 - AIRCRAFT WAS GROUNDED)

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