# SDR UIEA2025012300105

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 23, 2025
- Submitted: February 4, 2025
- Operation: Air carrier
- Aircraft: [N473MC](https://openairdocs.org/aircraft/N473MC), registered now
- Make and model: Boeing 747-45E
- Registry model: [Boeing 747-45E](https://openairdocs.org/model/boeing-747-45e) (OpenAirDocs)
- Aircraft serial: 27174
- Aircraft time: 119,336 hours, 21,525 cycles
- Engine: Ge CF680C2B1F
- System (JASC): [7200 · Engine (Turbine/Turboprop)](https://openairdocs.org/jasc/7200)
- Part: Engine
- Condition: Making Metal
- Location: Nr 4
- Stage of operation: CR
- How discovered: O
- Nature of condition: K, J
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/UIEA2025012300105

## Discrepancy

1.5 HOURS INTO FLIGHT, #4 OIL QUANTITY DROPPED TO 6 QTS.  AT ABOUT 2.5 HOURS, QTY SHOWED 0.  AT ABOUT 3 HOURS, OIL PRESSURE DROPPED TO 13 PSI AT LANDING.    STATUS MESSAGE ENG 4 OIL PRESS(<P>CHECK OIL IND, IND AT 0, VISUALLY CHECK OIL CAPACITY, CAPACITY AT 0. PER MCC INSPECT MAGNETIC CHIP DETECTOR IAW AMM 79-21-00, FOUND CONTAMINATION & LOTS OF METAL DEBRIS. MCC NOTIFIED. LP 1810379 P2: CHK EICAS MSG, ENG LOW OIL PRESS, 0 PSI. AS PER MCC, ADD OIL QTY TO 20, THEN GND CRANK DRY MOTOR, FOUND NO OIL PRESSURE, NO N1 IND IAW AMM 71-00-00. MCC NOTIFIED. LP 1900155 M14: R/R #4 ENG & OPS & LEAK CHK NORMAL PER AMM 71-00-02 & W/C 71-099-02-01.

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