# SDR UPS04542554

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: June 10, 2004
- Submitted: June 11, 2004
- Operation: Air carrier
- Aircraft: [N424UP](https://openairdocs.org/aircraft/N424UP), registered now
- Make and model: Boeing 757-24APF
- Registry model: [Boeing 757-24APF](https://openairdocs.org/model/boeing-757-24apf) (OpenAirDocs)
- Aircraft serial: 25369
- System (JASC): [2120 · Air Distribution System](https://openairdocs.org/jasc/2120)
- Part: Insulation
- Condition: Deteriorated
- Location: Air Duct
- Stage of operation: TX
- How discovered: O
- Nature of condition: O
- Precautionary procedure: D
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/UPS04542554

## Discrepancy

CREW NOTICED ELECTRICAL SMOKE SMELL DURING TAXI.  DID BTB FOR FURTHER INSPECTION.  CREW COULD NOT DETERMINE SOURCE.  FOUND AIR DISTRIBUTION DUCT INSULATION DETERIORATED AND HAD FALLEN ACROSS WIRING & C/B'S IN THE UPPER PORTION OF THE OVERHEAD P-11 PANEL.  REMOVED DETERIORATED INSULATION & CLEANED BACK OF P-11 PANELS, NO OTHER FAULTS NOTED.

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