# SDR 2004UALA01253

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 27, 2004
- Submitted: January 4, 2005
- Operation: Air carrier
- Aircraft: N198UA
- Make and model: Boeing 747422
- Aircraft serial: 28716
- Aircraft time: 29,724 hours, 3,714 cycles
- Engine: Pwa PW4056
- System (JASC): [2121 · Air Distribution Fan](https://openairdocs.org/jasc/2121)
- Part: Fan
- Condition: Failed
- Location: Lt Recirc
- Stage of operation: NR
- How discovered: O
- Nature of condition: J
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/2004UALA01253

## Discrepancy

ELEC UTIL BUS R EICAS ADVISORY MESSAGE DISPLAYED.  UTILITY BUSS 3 (OR 4) OR GALLEY BUSS 3 (OR 4) DOES NOT HAVE ELECTRICAL POWER ON IT.  AIRPLANE IS NOT IN LOAD SHED CONDITION.  THE LOWER LEFT RECIRCULATION FAN BEARINGS FAILED. THE FAN WAS REPLACED AND THE AIRCRAFT HAS NO FURTHER PROBLEMS.

---
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.