# SDR SCNA20251120447S

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: November 19, 2025
- Submitted: December 2, 2025
- Operation: Air carrier
- Aircraft: [N831SY](https://openairdocs.org/aircraft/N831SY), registered now
- Make and model: Boeing 737-83N
- Registry model: [Boeing 737-83N](https://openairdocs.org/model/boeing-737-83n) (OpenAirDocs)
- Aircraft serial: 28249
- Aircraft time: 69,476 hours, 31,162 cycles
- System (JASC): [4900 · Airborne Auxiliary Power Unit (APU) System](https://openairdocs.org/jasc/4900)
- Part: Apu
- Condition: Odor
- Location: Zone 100
- Stage of operation: CR
- 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/SCNA20251120447S

## Discrepancy

REPLACED APU REF AMM 49-15-11 FUME EVENT IN CABIN.

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