# SDR AALA202605047031

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 30, 2026
- Submitted: May 4, 2026
- Operation: Air carrier
- Aircraft: [N109NN](https://openairdocs.org/aircraft/N109NN), registered now
- Make and model: Airbus A321-231
- Registry model: [Airbus A321-231](https://openairdocs.org/model/airbus-a321-231) (OpenAirDocs)
- Aircraft serial: 5955
- Aircraft time: 44,541 hours, 8,952 cycles
- System (JASC): [2120 · Air Distribution System](https://openairdocs.org/jasc/2120)
- Part: Filter
- Part number: QB065403
- Condition: Contaminated
- Location: Zone 100
- 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/AALA202605047031

## Discrepancy

AIRCRAFT WAS GROUNDED: FLIGHT ATTENDANTS REPORTED A CHEMICAL SMELL IN BACK OF AIRCRAFT DURING DESCENT THROUGH ABOUT 10,000FT. FIRST OFFICER REPORTED SMELLING THE ODOR IN THE FLIGHT DECK AS WELL. MAINTENANCE ACCOMPLISHED SMOKE / ODOR / FUME TROUBLESHOOTING PER JAB CARDS 26L00021001, 26L00021002 AND 26L00021003 WITH NO DEFECTS NOTED. MAINTENANCE ACCOMPLISHED A DECONTAMINATION OF THE ENVIRONMANTAL CONTROL SYSTEM PER JOB CARD 26L00021014 AND REPLACED THE RECIRCULATION FILTERS PER AMM 21-21-41.

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