# SDR 9705136739

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 8, 1997
- Submitted: March 26, 2000
- Operation: Air carrier
- Aircraft: N639US
- Make and model: Boeing 747251F
- Aircraft serial: 23887
- Engine: Pwa JT9D7Q
- System (JASC): [7230 · Turbine Engine Compressor Section](https://openairdocs.org/jasc/7230)
- Part: Compressor
- Condition: Stalled
- Location: Nr 3 Engine
- Part time: 44,029 hours
- Stage of operation: CL
- Nature of condition: R
- Precautionary procedure: A, E, J
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/9705136739

## Discrepancy

NR 3 ENGINE EXPERIENCED TWO COMPRESSOR STALLS.  FLIGHT CREW SHUT DOWN NR 3 ENGINE AND BEGAN DUMPING 80,000 POUNDS OF FUEL IN PREPARATION FOR LANDING.  AN UNEVENTFUL LANDING WAS PERFORMED AT DEPARTURE AIRPORT.  MAINTENANCE FOUND EVIDENCE OF INTERNAL ENGINE DAMAGE.  REPLACED NR 3 ENGINE.  PART TOTAL CYCLES, 7,518.

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