# SDR AU510001729

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 8, 2005
- Submitted: June 6, 2006
- Operation: General aviation
- Make and model: Boeing 747*
- Engine: Ge CF680C2B2
- System (JASC): [2121 · Air Distribution Fan](https://openairdocs.org/jasc/2121)
- Part: Cooling Fan
- Part number: 732591D
- Condition: Failed
- Location: Cabin Air
- Part time: 46,387 hours
- Stage of operation: CR
- 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/AU510001729

## Discrepancy

UPPER RECIRCULATION FAN FAILED.  CIRCUIT BREAKER `OHD RECIRC FAN PWR 2` R7 ON P415 TRIPPED.  INVESTIGATION FOUND FAN BEARINGS HAD FAILED.

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