# SDR EIAA970092

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 13, 1997
- Submitted: March 26, 2000
- Operation: Air carrier
- Aircraft: N470EV
- Make and model: Boeing 747273C
- Aircraft serial: 20653
- Engine: Pwa JT9D7F
- System (JASC): [7260 · Turbine Engine Accessory Drive](https://openairdocs.org/jasc/7260)
- Part: Seal
- Part number: 727113
- Condition: Worn
- Location: Nr 4 Engine
- Part time: 79,940 hours
- Stage of operation: CR
- Nature of condition: K, J
- Precautionary procedure: E
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/EIAA970092

## Discrepancy

VHHH - DURING CRUISE FLIGHT, NR 4 ENGINE HAD LOW OIL QTY REQUIRING PRECAUTIONARY ENGINE SHUTDOWN.  OIL PRESSURE FLUCTUATED INTO CAUTION RANGE.  ENGINE NR 4 WAS SHUTDOWN IN FLIGHT.  INSPECTED NR 4 ENGINE FOR OIL LEAKS PER MM.  FOUND HYDRAULIC PUMP DRIVE SEAL LEAKING.  REPLACED SEAL PER MM, RUN UP LEAK CHECK WAS GOOD.  (M)

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