# SDR 97UAL900427

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: June 7, 1997
- Submitted: March 26, 2000
- Operation: Air carrier
- Aircraft: [N105UA](https://openairdocs.org/aircraft/N105UA), registered now
- Make and model: Boeing 747451
- Aircraft serial: 26473
- Engine: Pwa PW4056
- System (JASC): [7230 · Turbine Engine Compressor Section](https://openairdocs.org/jasc/7230)
- Part: Compressor Blade
- Part number: 51H211
- Condition: Cracked
- Location: Nr 4 Engine
- Stage of operation: TO
- Nature of condition: Y
- Precautionary procedure: A, E
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/97UAL900427

## Discrepancy

NR 4 ENGINE FAILED DURING TAKEOFF ROTATION.  AIRCRAFT RETURNED TO FIELD.  HIGH PRESSURE COMPRESSOR 11TH STAGE BLADE FAILED DUE TO FOD.  ENGINE WAS REPLACED.

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