# SDR UIEA2013081800451

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 18, 2013
- Submitted: August 19, 2013
- Operation: Air carrier
- Aircraft: [N780BA](https://openairdocs.org/aircraft/N780BA), registered now
- Make and model: Boeing 747409
- Aircraft serial: 24310
- Aircraft time: 71,629 hours, 14,041 cycles
- System (JASC): [2450 · AC Power Distribution System](https://openairdocs.org/jasc/2450)
- Part: Circuit Breaker
- Part number: BACC18AE20
- Condition: Damaged
- Part time: 71,629 hours, 14,041 cycles
- Stage of operation: CL
- How discovered: O
- Nature of condition: J
- Precautionary procedure: J, A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/UIEA2013081800451

## Discrepancy

DURING TAKEOFF, MULTIPLE EICAS MESSAGES APPEARED.  DUMPED FUEL AND RETURNED TO DEPARTURE. (DURING TROUBLESHOOTING FOUND CIRCUIT BREAKER C3140 (BUS 3 PWR SUPPLY) POPPED.  FURTHER INSPECTION REVEALED BREAKER ASSY DAMAGED.  R & R CIRCUIT BREAKER IAW & NBSP; SWPM 20-00.  OPS CHECK OF BUS 3 WAS NORMAL IAW AMM 24-23-01. EICAS MESSAGES CLEARED.

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