# SDR CALA2025121012011

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 9, 2025
- Submitted: December 11, 2025
- Operation: Air carrier
- Aircraft: [N27277](https://openairdocs.org/aircraft/N27277), registered now
- Make and model: Boeing 737-8
- Registry model: [Boeing 737-8](https://openairdocs.org/model/boeing-737-8) (OpenAirDocs)
- Aircraft serial: 64612
- Aircraft time: 11,324 hours, 3,805 cycles
- System (JASC): [2120 · Air Distribution System](https://openairdocs.org/jasc/2120)
- Part: Unknown
- Condition: Odor
- Location: Cockpit
- Stage of operation: DE
- 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/CALA2025121012011

## Discrepancy

DURING DESCENT, A STRONG ODOR ENTERED THE FLT DECK & LASTED UNTIL LANDING.  GOT WEAKER OVER TIME. PERFORM FIM 21-00, TASK 830 FOR ODOR.  BOTH HYDRAULIC SYSTEMS ARE NOT OVERSERVICED.  RAN APU, BOTH PACKS ON. SWITCH TO COLD & WARM. COULD NOT DUPLICATE ODOR.  INSPECTED BOTH E/E BAY & BOTH ENGINE INTAKES.  NOTHING UNUSUAL WAS FOUND.

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