# SDR UPS00531688

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 16, 2000
- Submitted: March 26, 2000
- Operation: Air carrier
- Aircraft: [N420UP](https://openairdocs.org/aircraft/N420UP), registered now
- Make and model: Boeing 757-24APF
- Registry model: [Boeing 757-24APF](https://openairdocs.org/model/boeing-757-24apf) (OpenAirDocs)
- Aircraft serial: 23907
- Engine: Pwa PW2040
- System (JASC): [7931 · Engine Oil Pressure](https://openairdocs.org/jasc/7931)
- Part: Switch
- Part number: 1B7361
- Condition: Failed
- Location: Lt Engine
- Stage of operation: CR
- Nature of condition: J
- Precautionary procedure: E
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/UPS00531688

## Discrepancy

HAD L OIL FILTER STATUS MSG.  SHUT ENG DOWN.  SYSTEM CHECKED IAW FIM 79-21-00, FIG 104, CHECKED CHIP DETECTORS.  REPLACED OIL FILTER, REPLACED DIFF PRESSURE SWITCH IAW MM 79-35-01, CHECKED CIRCUIT BETWEEN SWITCH AND EICAS COMPUTER CONNECTOR.  RUN ENGINE TEST 3A FOR 20 MIN, NO MSG NOTED AND LEAK CHECK OF CONNECTORS GOOD.

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