# SDR SCNA20250922386

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 20, 2025
- Submitted: September 22, 2025
- Operation: Air carrier
- Aircraft: [N849SY](https://openairdocs.org/aircraft/N849SY), registered now
- Make and model: Boeing 737-800
- Registry model: [Boeing 737-800](https://openairdocs.org/model/boeing-737-800) (OpenAirDocs)
- Aircraft serial: 41131
- Aircraft time: 24,180 hours, 14,514 cycles
- System (JASC): [2120 · Air Distribution System](https://openairdocs.org/jasc/2120)
- Part: Heat Exchanger
- Condition: Dirty
- Location: Zone 100
- 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/SCNA20250922386

## Discrepancy

L/H PACK FUME SMELL ( AIR CONDITIONING PACKS (PRESSURIZED) )	R&R OF RECIRCULATION FILTERS ACCOMPLISHED ON W/O 98445 N/R-00001 PERFORMED L/H PACK HEAT EXCHANGER CLEAN IAW AMM 21-51-00 PERFORMED FIM 21-00 TASK 802 NO SIGN OF CABIN FUMES THIS CLEARS MEL

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