# SDR P5CA9701169

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: June 20, 1997
- Submitted: March 26, 2000
- Operation: Air carrier
- Aircraft: [N858FT](https://openairdocs.org/aircraft/N858FT), registered now
- Make and model: Boeing 747123
- Aircraft serial: 20109
- Engine: Pwa JT9D7A
- System (JASC): [7261 · Turbine Engine Oil System](https://openairdocs.org/jasc/7261)
- Part: O-Ring
- Part number: M832481237
- Condition: Pinched
- Location: Nr 4 Engine
- Stage of operation: CR
- Nature of condition: J
- Precautionary procedure: A, E
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/P5CA9701169

## Discrepancy

NR 4 ENGINE OIL QUANTITY DECREASED TO ZERO IN FLIGHT, RATE OF DECREASE 1.5 GALLONS PER HOUR.  LOW OIL PRESSURE LIGHT ILLUMINATED WITH LOW OIL PRESSURE INDICATED ENGINE SHUT DOWN.  REPLACED PINCHED O-RING ON MAIN OIL FILTER HOUSING PER MAINTENANCE MANUAL 72-61-05.  LEAK CHECK OK PER MAINTENANCE MANUAL 71-00-00.

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