# SDR DALA2026042502629

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 24, 2026
- Submitted: April 25, 2026
- Operation: Air carrier
- Aircraft: [N521DT](https://openairdocs.org/aircraft/N521DT), 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: 11082
- Aircraft time: 15,063 hours, 3,691 cycles
- Engine: Iae PW1133GJM
- System (JASC): [7200 · Engine (Turbine/Turboprop)](https://openairdocs.org/jasc/7200)
- Part: Engine
- Condition: Odor
- Location: Nr 2
- Stage of operation: NR
- 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/DALA2026042502629

## Discrepancy

ON TAXI IN TO BOS FA'S IN AFT OF THE AIRCRAFT NOTICED A MILDEW/DIRTY SOCK ODOR THAT BEGAN ON FINAL JUST BEFORE GEAR EXTENTION. NO PAX NOTICED IT AND THE SMELL DISIPATED AFTER BLOCK IN. APU BLEED WAS NOT USED.   REPLACED NR 2 ENGINE. (LP 8537300 - AIRCRAFT WAS GROUNDED)

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