# SDR CALA2025090408465

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 2, 2025
- Submitted: September 4, 2025
- Operation: Air carrier
- Aircraft: [N37527](https://openairdocs.org/aircraft/N37527), registered now
- Make and model: Boeing 737-9
- Registry model: [Boeing 737-9](https://openairdocs.org/model/boeing-737-9) (OpenAirDocs)
- Aircraft serial: 43463
- Aircraft time: 15,768 hours, 5,157 cycles
- System (JASC): [2120 · Air Distribution System](https://openairdocs.org/jasc/2120)
- Part: Unknown
- Condition: Odor
- Location: Cabin
- Stage of operation: NR
- How discovered: O
- Nature of condition: B
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/CALA2025090408465

## Discrepancy

RELEASED BACK TO SERVICE AFTER EXPERIENCING A DIVERSION OR AIR TURN BACK DUE TO A MECHANICAL REASON. FOUND SOURCE OF FUMES SMELL WAS COMING FROM #2 ENG BLEED.  INSP FAN BLADES AND BORO PLUGS, NO DEFECTS.  ACCOMPLISHED #2 ENG WASH AND HIGH PWR RUN WITH ENG BLEED ON AND PACKS ON.  NO FURTHER SMOKE OR SMELL NOTED.  RECIRC FILTERS WERE REPLACED AS WELL.

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