# SDR SWAA2026021270217

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 11, 2026
- Submitted: February 12, 2026
- Operation: Air carrier
- Aircraft: [N488WN](https://openairdocs.org/aircraft/N488WN), registered now
- Make and model: Boeing 737-7H4
- Registry model: [Boeing 737-7H4](https://openairdocs.org/model/boeing-737-7h4) (OpenAirDocs)
- Aircraft serial: 33853
- Aircraft time: 70,290 hours, 42,001 cycles
- System (JASC): [2170 · Humidity Control System](https://openairdocs.org/jasc/2170)
- Part: Water Separator
- Condition: Fumes
- Location: Zone 200
- Stage of operation: CL
- 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/SWAA2026021270217

## Discrepancy

AFTER TAKEOFF, ACRID FUMES.  APPARENT SOURCE COULD NOT BE IDENTIFIED.  FLIGHT ATTENDANTS REPORTED IT WAS NOTICIABLE THROUGHT THE CABIN.  STRONG FUMES NOTICIABLE IN THE COCKPIT.  PERFORMED CONDITIONAL INSPECTION IAW AMM 05-51-56.  PERFORMED FIM 21-31,TASK 806.  REPLACED HEPA FILTER IAW AMM 21-25-01. REPLACED LT PACK WATER SEPARATOR BAG IAW AMM 21-50-05. THE SOURCE OF THE FUMES WAS DETERMINED TO BE THE LT ACM.

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