# SDR ASAA2015111213762

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: November 12, 2015
- Submitted: November 16, 2015
- Operation: Air carrier
- Aircraft: [N534AS](https://openairdocs.org/aircraft/N534AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35202
- Aircraft time: 19,370 hours, 5,686 cycles
- System (JASC): [2420 · AC Generation System](https://openairdocs.org/jasc/2420)
- Part: Circuit Breaker
- Part number: 11519681
- Condition: Failed
- Location: Flight Deck
- Stage of operation: TX
- 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/ASAA2015111213762

## Discrepancy

ON ENGINE SHUTDOWN THE NR 1 TRANSFER BUS OFF LIGHT CAME ON.  ACFT GROUNDED. ISOLATED TO FAULTY BUS TIE BREAKER C804.  R & R C804 BUS TIE BREAKER NR 1 IAW MM 24-21-41. TESTS GOOD IAW SAME.  NR 1 GCU CHECKS GOOD IAW INSTRUMENT TEST MM 24-21-81.

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