# SDR TWAA9616001

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 23, 1996
- Submitted: March 26, 2000
- Operation: Air carrier
- Aircraft: [N490SA](https://openairdocs.org/aircraft/N490SA), registered now
- Make and model: Doug DC-9-15
- Registry model: [Doug DC-9-15](https://openairdocs.org/model/mcdonnell-douglas-dc-9-15) (OpenAirDocs)
- Aircraft serial: 45798
- System (JASC): [7930 · Engine Oil Indicating System](https://openairdocs.org/jasc/7930)
- Part: Bypass Switch
- Part number: 42D1091A
- Condition: Leaking
- Location: Nr 2 Engine
- Stage of operation: CR
- Nature of condition: K, J
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/TWAA9616001

## Discrepancy

STL - DURING CRUISE, SHUT DOWN NR 2 ENGINE, S/N 3811, DUE TO LOSS OF OIL QTY.  FOUND OIL FILTER BYPASS SWITCH, MFG P/N 42D109-1A, LEAKING.  REPLACED OIL FILTER BYPASS SWITCH.  ENGINE OPERATION AND LEAKS CHECKS NORMAL.  (M)

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