# SDR ASAA2015121714334

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 17, 2015
- Submitted: December 22, 2015
- Operation: Air carrier
- Aircraft: [N513AS](https://openairdocs.org/aircraft/N513AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35192
- Aircraft time: 27,753 hours, 8,434 cycles
- System (JASC): [7330 · Engine Fuel Indicating System](https://openairdocs.org/jasc/7330)
- Part: Pressure Switch
- Part number: QA07995
- Part serial: RZ18811
- Condition: Failed
- Location: Nr 1 Engine
- Part time: 614 hours, 153 cycles
- Stage of operation: TX
- 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/ASAA2015121714334

## Discrepancy

LEFT ENGINE FILTER BYPASS LIGHT ILLUMINATED 1 MINUTE AFTER ENGINE START.  LIGHT WENT OUT AFTER ENGINE SHUTDOWN.  ACFT GROUNDED. R & R NR 1 ENGINE FUEL PRESSURE DIFFERENTAL SWITCH IAW AMM 73-34-01-400-801.  LEAK TEST AND OPS CHECK GOOD.

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