# SDR 2001UALA01673

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 12, 2001
- Submitted: September 5, 2001
- Operation: Air carrier
- Aircraft: N183UA
- Make and model: Boeing 747422
- Aircraft serial: 25379
- Aircraft time: 44,570 hours, 5,370 cycles
- Engine: Pwa PW4056
- System (JASC): [2121 · Air Distribution Fan](https://openairdocs.org/jasc/2121)
- Part: Fan
- Condition: Failed
- Location: Cabin
- Stage of operation: CR
- How discovered: O
- Nature of condition: B, J
- Precautionary procedure: H
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/2001UALA01673

## Discrepancy

ELECTRIC BURN ODOR IN CABIN FOLLOWED BY STATUS MSG "RECIRCULATING FAN UPPER  L". TURNED OFF UPPER RECIRCULATING FANS AND ODOR DISSIPATED. PRESENT LEC FAULT MSG "FAIL-L WIRING FAIL". THE LEFT OVERHEAD RECIRCULATION FAN EXPERIENCED A BEARING FAILURE. FAN WAS REPLACED.

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