# SDR 9802496608

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 10, 1998
- Submitted: March 26, 2000
- Operation: Air carrier
- Aircraft: N608US
- Make and model: Boeing 747151
- Aircraft serial: 19785
- Engine: Pwa JT9D7A
- System (JASC): [7200 · Engine (Turbine/Turboprop)](https://openairdocs.org/jasc/7200)
- Part: Engine
- Condition: Failed
- Location: Nr 1
- Stage of operation: CR
- Nature of condition: K
- Precautionary procedure: E, A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/9802496608

## Discrepancy

WHILE AT CRUISE, THE NR 1 ENGINE OIL QUANTITY DECREASED TO ZERO WITH THE PRESSURE AT 25 PSI.  THE ENGINE WAS SHUT DOWN AND THE AIRCRAFT RETURNED TO NRT.  MAINTENANCE REPLACED THE NR 1 ENGINE THE EXACT PART CAUSING DIFFICULTY TO BE DETERMINED.

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