# SDR P5CA2013022500004

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 25, 2013
- Submitted: February 25, 2013
- Operation: Air carrier
- Aircraft: [N453PA](https://openairdocs.org/aircraft/N453PA), registered now
- Make and model: Boeing 747-46NF
- Registry model: [Boeing 747-46NF](https://openairdocs.org/model/boeing-747-46nf) (OpenAirDocs)
- Aircraft serial: 30811
- Aircraft time: 49,903 hours, 8,079 cycles
- System (JASC): [2121 · Air Distribution Fan](https://openairdocs.org/jasc/2121)
- Part: Fan
- Part number: 4100149C
- Part serial: 0993
- Condition: Failed
- Location: Equipment Bay
- Part time: 13,511 hours, 2,438 cycles
- Stage of operation: TX
- How discovered: O
- Nature of condition: B
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/P5CA2013022500004

## Discrepancy

PRIOR TO DEPARTURE FOUND BAD SMELL CAME OUT.  TROUBLESHOOTING FOUND EQUIPMENT COOLING SUPPLY FAN HAVING INTERNAL FAILURE AND BAD SMELL COMING FROM FAN.  FAN WAS REPLACED PER AMM 21-58-01/401.

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