# SDR TWAA9717001

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 1, 1997
- Submitted: March 26, 2000
- Operation: Air carrier
- Aircraft: N93107
- Make and model: Boeing 747131
- Aircraft serial: 19673
- System (JASC): [7931 · Engine Oil Pressure](https://openairdocs.org/jasc/7931)
- Part: Pressure Switch
- Part number: 21SN04149
- Condition: Failed
- Location: Nr 1 Engine
- Stage of operation: CR
- Nature of condition: N
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/TWAA9717001

## Discrepancy

MIA - FLT 144 - DURING CRUISE, NR 1 ENGINE, S/N 4318, OIL FILTER BYPASS LIGHT ILLUMINATED.  REMOVED AND REPLACED PRESSURE SWITCH, MFG P/N 21SN04-149.  OPERATION CHECK AND ENGINE RUN NORMAL.  (M)

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