# SDR SWAA2025110531910

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: November 4, 2025
- Submitted: November 5, 2025
- Operation: Air carrier
- Aircraft: [N7862A](https://openairdocs.org/aircraft/N7862A), registered now
- Make and model: Boeing 737-79P
- Registry model: [Boeing 737-79P](https://openairdocs.org/model/boeing-737-79p) (OpenAirDocs)
- Aircraft serial: 33009
- Aircraft time: 60,375 hours, 40,066 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/SWAA2025110531910

## Discrepancy

ON TAXI IN, STARTED APU, TURNED ON APU AIR. SMELLED SMOKE, TURNED OFF APU AIR AND APU.  TURNED OFF RECIRCULATION FAN ODOR  CLEARED.  SMOKE ODOR IN ENTIRE CABIN, FWD AND AFT. C/W INSPECTION 05-51-56-0200-801 COULD NOT DUPLICATE.  REPLACED COALESCER BAGS NR 1 & 2,  PACKS IAW AMM 21-51-05.  OPS CHECK GOOD.

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.