# SDR UPS99430152

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 23, 1999
- Submitted: March 26, 2000
- Operation: Air carrier
- Aircraft: N680UP
- Make and model: Boeing 747-SR-46
- Registry model: [Boeing 747-SR-46](https://openairdocs.org/model/boeing-747-sr-46) (OpenAirDocs)
- Aircraft serial: 20923
- System (JASC): [7200 · Engine (Turbine/Turboprop)](https://openairdocs.org/jasc/7200)
- Part: Engine
- Condition: Failed
- Location: Nr 4
- Stage of operation: DE
- Nature of condition: M
- Precautionary procedure: E
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/UPS99430152

## Discrepancy

NR 4 ENGINE SHUTDOWN IN FLIGHT ON FINAL APPROACH HAD A COMPRESSOR STALL WITH DESCENT POWER ON WITH A IMMEDIATE RAPID RISE IN EGT.  SHUTDOWN EGT SHOWS MAX 914.  FELT COMPRESSOR STALL AND HEARD LOW RUMBLE AFTER THRUST LEVER RETARDED TO FLIGHT IDLE.  REMOVED AND REPLACED NR 4 ENGINE PER B747 TC 50 00.

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