# SDR ASAA2018021323541

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 13, 2018
- Submitted: February 16, 2018
- Operation: Air carrier
- Aircraft: [N533AS](https://openairdocs.org/aircraft/N533AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35201
- Aircraft time: 27,854 hours, 8,165 cycles
- System (JASC): [2420 · AC Generation System](https://openairdocs.org/jasc/2420)
- Part: Unknown
- Condition: Malfunctioned
- Stage of operation: DE
- 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/ASAA2018021323541

## Discrepancy

AT 27,000 FT ON DESCENT, TURNED ON ENGINE ANTI-ICE- GOT NR 2 TRANSFER BUS OFF LITE AND SOURCE OFF LITE, NO BLUE GEN BUS OFF LITE. NO CB'S OUT. DID QRH- STARTED APU & PUT ON RIGHT SIDE PER QRH. SOURCE OFF BUS WENT OUT- STILL HAD TRANSFER BUS OFF LITE. PUT GRD POWER ON AT GATE - TRANSFER BUS OFF LITE WENT OUT & BLUE GEN OFF BUS LITE CAME ON. GROUNDED - YES. ACCOMPLISHED B737-800 FIM 24-21 TASK 822 & TASK 823. NO FAULTS NOTED. PERFORMED ENG IDLE RUN AND ALL A/C IND NORMAL. TRANSFER BUS OFF LT & SOURCE OFF LT REMAINED EXTINGUISHED. NO HISTORY 30 DAYS.

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