# SDR 9709386601

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 13, 1997
- Submitted: March 26, 2000
- Operation: Air carrier
- Aircraft: N601US
- Make and model: Boeing 747151
- Aircraft serial: 19778
- Engine: Pwa JT9D7A
- System (JASC): [7200 · Engine (Turbine/Turboprop)](https://openairdocs.org/jasc/7200)
- Part: Engine
- Condition: Malfunctioned
- Location: Nr 4
- Stage of operation: TX
- Nature of condition: M, J
- Precautionary procedure: D, E
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/9709386601

## Discrepancy

DURING TAXI, THE NR 4 ENGINE EGT WENT TO TOP OF GAUGE FOR APPROXIMATELY 90 TO 120 SECONDS.  ALSO, NR 4 ENGINE OIL RPESSURE WARNING LIGHT ILLUMINATED.  NO FIRE WARNING AND OIL TEMPERATURE WAS NORMAL.  MAINTENANCE INSPECTED ENGINE PER MM 72-00-00.  NO DEFECTS WERE NOTED.  ENGINE RUN AT IDLE CHECKED GOOD.  SPECIFIC PART CAUSING PROBLEM TO BE DETERMINED.

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