# SDR DALA2026080404500

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 1, 2026
- Submitted: August 5, 2026
- Operation: Air carrier
- Aircraft: [N375DN](https://openairdocs.org/aircraft/N375DN), registered now
- Make and model: Airbus A321-211
- Registry model: [Airbus A321-211](https://openairdocs.org/model/airbus-a321-211) (OpenAirDocs)
- Aircraft serial: 8812
- Aircraft time: 23,328 hours, 9,953 cycles
- System (JASC): [4990 · APU Oil System](https://openairdocs.org/jasc/4990)
- Part: Oil Cap
- Condition: Leaking
- Location: Apu
- Stage of operation: NR
- 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/DALA2026080404500

## Discrepancy

DIRTY SOCK ODOR,  6000-4000FT DEEMED TO DISSIPATE AFTER A MINUTE.   FOUND OIL SEEPING THROUGH APU OIL FILLER CAP. REMOVED AND REPLACED APU FILLER CAP ROLLER AND BOLT IAW CMM 49-27-27. CLEANED AREA AND CHECKED FOR LEAK. NO LEAKS NOTED. (LP 8780332, 1731517 - AIRCRAFT WAS GROUNDED)

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