# SDR 0003785520

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 8, 2000
- Submitted: October 25, 2000
- Operation: Air carrier
- Aircraft: N520US
- Make and model: Boeing 757251
- Aircraft serial: 23208
- Aircraft time: 46,743 hours, 19,778 cycles
- System (JASC): [2121 · Air Distribution Fan](https://openairdocs.org/jasc/2121)
- Part: Circuit Breaker
- Part number: 675231120
- Condition: Tripped
- Location: Recirc Fan
- Stage of operation: CR
- 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/0003785520

## Discrepancy

R RECIR FAN EICAS MESSAGE AND RECIRCULATION FAN INOPERATIVE LIGHT ILLUMINATED WITH SWITCH POSITIONED ON.  MAINTENANCE FOUND FIRE DAMAGE TO THE FAN WIRE HARNESS, INSULATION BLANKETS, FAN ELECTRICAL PLUG, AND LOWER FAN BRACKET.  REPAIRED FAN WIRE HARNESS.  REPLACED RECIRCULATION FAN, BLANKETS, AND ELECTRICAL PLUG.  ALSO REPLACED RIGHT RECIRCULATION FAN CIRCUIT BREAKER AND RELAY.  OPERATIONAL CHECK OK.

---
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.