# SDR AALA202305268641

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 25, 2023
- Submitted: May 26, 2023
- Operation: Air carrier
- Aircraft: [N845NN](https://openairdocs.org/aircraft/N845NN), registered now
- Make and model: Boeing 737823
- Aircraft serial: 40579
- Aircraft time: 38,131 hours, 15,725 cycles
- System (JASC): [2120 · Air Distribution System](https://openairdocs.org/jasc/2120)
- Part: Air Filter
- Part number: P199753
- Condition: Inoperative
- Location: Zone 100 - Fuse
- Stage of operation: TO
- How discovered: O
- Nature of condition: B
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AALA202305268641

## Discrepancy

AIRCRAFT WAS GROUNDED: ON TAKEOFF BEGAN TO SMELL A DIRTY SOCK ODOR, ODOR DISSIPATED AT ALTITUDE ODOR, CAME BACK AROUND 15000 FT ON DESCENT. INSPECTED, REMOVED, AND REPLACED LEFT AND RIGHT AIR RECIRCULATING FILTERS (AALA202305268641 AND AALA202305269452).

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.