# SDR ASAA1159967

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: June 30, 2011
- Submitted: July 5, 2011
- Operation: Air carrier
- Aircraft: [N559AS](https://openairdocs.org/aircraft/N559AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35178
- Aircraft time: 17,985 hours, 5,441 cycles
- System (JASC): [4960 · APU Controls](https://openairdocs.org/jasc/4960)
- Part: Sensor
- Part number: 38762231
- Condition: Faulty
- Location: Apu
- Stage of operation: NR
- How discovered: O
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA1159967

## Discrepancy

APU GENERATOR KICKED OFF BUS.  ACCOMPLISHED FIM TASK 49 60 00 810 817 SPEED SENSOR 1 OR 2 SHOWS CIRCUIT FAILURE.  FOUND NUMEROUS FAULTS ON NR 1 SPEED SENSOR.  REPLACED SPEED SENSOR PER M/M 49 61 21.  GROUND VERIFICATION CHECKS GOOD.

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