# SDR SWAA2026042090096

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 16, 2026
- Submitted: April 20, 2026
- Operation: Air carrier
- Aircraft: [N480WN](https://openairdocs.org/aircraft/N480WN), registered now
- Make and model: Boeing 737-7H4
- Registry model: [Boeing 737-7H4](https://openairdocs.org/model/boeing-737-7h4) (OpenAirDocs)
- Aircraft serial: 33998
- Aircraft time: 71,929 hours, 43,027 cycles
- System (JASC): [2170 · Humidity Control System](https://openairdocs.org/jasc/2170)
- Part: Coalescer Bag
- Condition: Odor
- Location: Zone 100
- Stage of operation: TX
- 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/SWAA2026042090096

## Discrepancy

AFTER LANDING A STRONG ELECTRICAL ODOR STARTED THEN DISSIPATED THROUGHOUT CABIN AND COCKPIT.   FOUND SLIGHT ODOR FROM AIR DUCTS WHEN APU INITIALLY TURNED ON; THEN DISSIPATED QUICKLY. T/S PER FIM 21-00-806. SERVICED APU,  CHECKED BLEED VALVE DUCT AND INLET FOR EVIDENCE OF OIL. NO DEFECTS FOUND. CHECKED CHIP DETECTOR; NO DEBRIS FOUND. SEE TTG8Q01BQET0 FOR L&R COALESCER BAG R&R. RAN APU AGAIN AND ODOR WAS NOT PRESENT.

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