# SDR AALA20180406006

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 5, 2018
- Submitted: April 25, 2018
- Operation: Air carrier
- Aircraft: [N984NN](https://openairdocs.org/aircraft/N984NN), registered now
- Make and model: Boeing 737823
- Aircraft serial: 31234
- Aircraft time: 7,283 hours, 2,880 cycles
- System (JASC): [4970 · APU Indicating System](https://openairdocs.org/jasc/4970)
- Part: Sensor
- Condition: Faulted
- Location: Apu Speed
- Stage of operation: CR
- How discovered: O
- Nature of condition: O
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AALA20180406006

## Discrepancy

APU INOPERATIVE.   EMERGENCY DECLARED LANDED WITHOUT FURTHER INCIDENT. THE AIRCRAFT WAS GROUNDED.   RAN APU FOUND NO CURRENT FAULTS IN BITE HISTORY,  FOUND FAULT 49-61259. FOLLOWED FIM 49-60-0-810-817.   R & R THE SPEED SENSOR IAW  AMM 49-61-21. OPS CHECKED GOOD.

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