# SDR 9JLA20111107001

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: November 7, 2010
- Submitted: August 30, 2011
- Operation: Air carrier
- Aircraft: N393GH
- Make and model: Beech 400A
- Registry model: [Beech 400A](https://openairdocs.org/model/hawker-beechcraft-400a) (OpenAirDocs)
- Aircraft serial: RK240
- Aircraft time: 3,647 hours, 2,949 cycles
- System (JASC): [2400 · Electrical Power System](https://openairdocs.org/jasc/2400)
- Part: Rccb
- Part number: 45AS8881003
- Part serial: 001194
- Condition: Defective
- Location: Electrical Sys
- Stage of operation: NR
- How discovered: O
- Nature of condition: O
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/9JLA20111107001

## Discrepancy

THE CREW REPORTED THE LT BUS TIE CIRCUIT BREAKER TRIPPED DURING THE PREFLIGHT CHECKS.  TROUBLESHOOTING FOUND THAT THE LEFT BUS TIE RCCB P/N 45AS88810-003 S/N 001194 TO BE DEFECTIVE.  INSTALLED A NEW RCCB, FUNCTIONAL CHECKS SATISFACTORY (RCCB = REMOTE CONTROLLED CIRCUIT BREAKER).

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