# SDR CALA2025092409191

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 22, 2025
- Submitted: September 24, 2025
- Operation: Air carrier
- Aircraft: [N37556](https://openairdocs.org/aircraft/N37556), registered now
- Make and model: Boeing 737-9
- Registry model: [Boeing 737-9](https://openairdocs.org/model/boeing-737-9) (OpenAirDocs)
- Aircraft serial: 67579
- Aircraft time: 9,066 hours, 2,967 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: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/CALA2025092409191

## Discrepancy

OBVIOUS AND OVERWHELMING SMELL OF CIGARETTE SMOKE IN PACK 1 SYSTEM. STRONG IN FLIGHT DECK. RAN PACKS, NO SMELL COMING FROM VENTS. TESTED SMOKE DETECTOR AS A PRECAUTION. CHECKED OK. INSPECTED IN ALL CABINETS AND BEHIND LAV SHROUD. INSPECTED LT PACK BAY. NO DEFECTS NOTED. OK TO CONTINUE.

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