# SDR 96UAL900369

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 30, 1996
- Submitted: March 26, 2000
- Operation: Air carrier
- Aircraft: [N171UA](https://openairdocs.org/aircraft/N171UA), registered now
- Make and model: Boeing 747422
- Aircraft serial: 24322
- Engine: Pwa PW4056
- System (JASC): [7230 · Turbine Engine Compressor Section](https://openairdocs.org/jasc/7230)
- Part: Compressor
- Part number: 55H005
- Condition: Failed
- Location: Nr 4 Engine
- Stage of operation: TO
- Nature of condition: B, J
- Precautionary procedure: C, D, F
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/96UAL900369

## Discrepancy

WHEN TAKEOFF THRUST WAS SET HEARD LOUD BANG FROM RIGHT SIDE OF AIRCRAFT.  SMOKE SEEN IN NR 4 ENGINE.  FIRED BOTH BOTTLES TO ENGINE.  *S/D*  HIGH COMPRESSOR STG 5 BLADE FAILURE, NO EVIDENCE OF FIRE.  REPLACED ENGINE.

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