# SDR CALA2026082518884

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 23, 2026
- Submitted: August 25, 2026
- Operation: Air carrier
- Aircraft: [N54538](https://openairdocs.org/aircraft/N54538), 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: 12561
- Aircraft time: 2,898 hours, 1,097 cycles
- Engine: Iae PW1133GAJM
- System (JASC): [2120 · Air Distribution System](https://openairdocs.org/jasc/2120)
- Part: Filter
- Part number: 424B2007
- Condition: Clogged
- Location: Cabin Air
- Stage of operation: DE
- 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/CALA2026082518884

## Discrepancy

STRANGE ODOR ON DESCENT STARTED AT 13000 DAMP DIRTY SOCK SMELL PER TSM 05-50-00-810-831-A TYPE 6 LEVEL A PERFORMED PACK BURN FOR 25 MINS AND ALSO REMOVED AND REPLACED RECIRCULATION FILTER CARTRIDGES PER AMM TASK 21-21-41-000-001-A PACKS RAN NORMAL AND NO SMELLS INDICATED ALSO INSPECTED RIGHT PACK AND NO INDICATIONS OF RESIDUE.

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