# SDR DALA2026083004891

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 29, 2026
- Submitted: August 30, 2026
- Operation: Air carrier
- Aircraft: [N543DE](https://openairdocs.org/aircraft/N543DE), 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: 11553
- Aircraft time: 12,922 hours, 3,148 cycles
- System (JASC): [2120 · Air Distribution System](https://openairdocs.org/jasc/2120)
- Part: Unknown
- Condition: Odor
- Location: Cabin
- Stage of operation: DE
- How discovered: O
- Nature of condition: B
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/DALA2026083004891

## Discrepancy

ON DESCENT THROUGH 15000 FA FRONT AND BACK OF THE PLANE SMELLED A STRONG DIRTY SOCK SMELL THAT PERSISTED UNTIL LANDING AND SLOWLY DISSIPATED AFTER, THEY SMELLED A CHEMICAL SMELL AS WELL AFTER OPENING CABIN.   PER P TRAK RESULT, DEEMED APU CHANGE REGUIRED. REPLACED APU. (LP 8547444, 1783569 - AIRCRAFT WAS GROUNDED)

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