# SDR SWAA2022061015829

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: June 6, 2022
- Submitted: June 10, 2022
- Operation: Air carrier
- Aircraft: [N494WN](https://openairdocs.org/aircraft/N494WN), registered now
- Make and model: Boeing 737-7H4
- Registry model: [Boeing 737-7H4](https://openairdocs.org/model/boeing-737-7h4) (OpenAirDocs)
- Aircraft serial: 33868
- Aircraft time: 59,110 hours, 35,222 cycles
- System (JASC): [2120 · Air Distribution System](https://openairdocs.org/jasc/2120)
- Part: Duct
- Condition: Smoke
- Location: Pax Cabin
- Stage of operation: TO
- How discovered: 9
- Nature of condition: B
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/SWAA2022061015829

## Discrepancy

ON TAKEOFF DUCT TEMP WENT TO OVER 110 DEG AND A STRONG ACRID BURNING SMELL AND FAINT SMOKE WAS IN COCKPIT. FLIGHT ATTENDANTS ALSO SMELLED WHAT THEY THOUGHT WAS PLASTIC BURNING IN THE BACK OF THE AIRCRAFT. RETURNED TO DEPARTURE AIRPORT / [01] PERFORMED FIM TASK 21-00-806. NO BURNING SMELL OR FAINT SMOKE APPEARED DURING TEST AND ALL CONDITIONS WERE FOUND TO BE NORMAL AT THIS TIME. AIRCRAFT IS OK FOR SERVICE.

---
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.