# SDR DALA2026041302326

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 11, 2026
- Submitted: April 13, 2026
- Operation: Air carrier
- Aircraft: [N331DN](https://openairdocs.org/aircraft/N331DN), registered now
- Make and model: Airbus A321-213
- Registry model: [Airbus A321-213](https://openairdocs.org/model/airbus-a321-213) (OpenAirDocs)
- Aircraft serial: 7943
- Aircraft time: 26,112 hours, 11,374 cycles
- System (JASC): [2120 · Air Distribution System](https://openairdocs.org/jasc/2120)
- Part: Generator
- Condition: Odor
- Location: Ozone
- Stage of operation: TX
- 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/DALA2026041302326

## Discrepancy

APU BLEED ON AT GATE LEAD TO IMMEDIATE STRONG OIL SMELL.   REPLACED NGS OZONE GEN AND OZONE FILTER RT SIDE AND LEFT OZONE FILTER PER A321 AMM 21-58 + 21-51. (LP 8610384 - AIRCRAFT WAS GROUNDED)

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