# SDR ASAA12511572

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 17, 2012
- Submitted: May 21, 2012
- Operation: Air carrier
- Aircraft: [N557AS](https://openairdocs.org/aircraft/N557AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35176
- Aircraft time: 22,560 hours, 6,730 cycles
- Engine: Cfmint CFM567B27
- System (JASC): [2400 · Electrical Power System](https://openairdocs.org/jasc/2400)
- Part: Buss
- Condition: Power Loss
- Stage of operation: TX
- How discovered: 9
- Nature of condition: O
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA12511572

## Discrepancy

DURING APU START ON STANDBY POWER, STANDBY BUSS LOST POWER.  ACFT GROUNDED. PERFORMED APU START AND OPERATION IAW AMM 49-11-00-860-801. OPS CHECKED GOOD.

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