# SDR ASAA2016073117557

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 31, 2016
- Submitted: August 1, 2016
- Operation: Air carrier
- Aircraft: [N495AS](https://openairdocs.org/aircraft/N495AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 41728
- Aircraft time: 1,576 hours, 512 cycles
- System (JASC): [3440 · Independent Position Determining System](https://openairdocs.org/jasc/3440)
- Part: Warning Light
- Condition: False Activation
- Stage of operation: NR
- How discovered: O
- Nature of condition: N
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2016073117557

## Discrepancy

FAULT LIGHT ILLUMINATED ON HGS DISPLAY.  ACFT GROUNDED.  FAULT LIGHT NOT ACTIVE, HGS FLIGHT HISTORY SHOWS FC 80 & 81 WITH NO HISTORY.   ACCOMPLISHED HGS SYSTEM TEST, IAW SMM 34-36-00.  OPS NORMAL.

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