# SDR UALA2011081604347

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 15, 2011
- Submitted: September 2, 2011
- Operation: Air carrier
- Aircraft: N199UA
- Make and model: Boeing 747422
- Aircraft serial: 28717
- Aircraft time: 56,625 hours, 6,705 cycles
- Engine: Pwa PW4056
- System (JASC): [2120 · Air Distribution System](https://openairdocs.org/jasc/2120)
- Part: Unknown
- Condition: Odor
- Location: Cabin
- Stage of operation: IN
- 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/UALA2011081604347

## Discrepancy

CABIN REPORTED BURN ODOR THROUGHOUT CABIN.  TURNED OFF UPPER RECIRC FAN.  RAN UPPER RECIRC FANS AND LOWER RECIRC FANS AND TESTED WIRING VIA CMC.  FOUND NO FAULTS AND ALL OP NORMAL.  NO BURN ODOR THROUGHOUT CABIN PRESENT.

---
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.