# SDR SWAA002745

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 26, 2000
- Submitted: December 28, 2000
- Operation: Air carrier
- Aircraft: N618WN
- Make and model: Boeing 737-3H4
- Registry model: [Boeing 737-3H4](https://openairdocs.org/model/boeing-737-3h4) (OpenAirDocs)
- Aircraft serial: 28034
- Aircraft time: 58,818 hours, 63,496 cycles
- System (JASC): [7931 · Engine Oil Pressure](https://openairdocs.org/jasc/7931)
- Part: Pressure Switch
- Part number: 21SN04226A
- Part serial: M648A
- Condition: Malfunctioned
- Location: Nr 2 Engine
- Stage of operation: CL
- How discovered: O
- Nature of condition: J
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/SWAA002745

## Discrepancy

AIR TURNBACK NR 2 ENG OIL FILTER BYPASS ILLUMINATED STEADILY.  LIGHT FLICKERED WITH THROTTLE AT IDLE.  OIL PRESS INDICATED NORMAL IN FLIGHT - NO DECREASE NOTED. R&R DIFFERENTIAL PRESS SWITCH PER MM, OPS CHECK GOOD.

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