# SDR IPXA2016122812205

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 24, 2016
- Submitted: December 30, 2016
- Operation: Air carrier
- Aircraft: [N573UP](https://openairdocs.org/aircraft/N573UP), registered now
- Make and model: Boeing 747-44AF
- Registry model: [Boeing 747-44AF](https://openairdocs.org/model/boeing-747-44af) (OpenAirDocs)
- Aircraft serial: 35662
- Aircraft time: 33,016 hours, 5,138 cycles
- Engine: Ge CF680C2B1F1
- System (JASC): [7230 · Turbine Engine Compressor Section](https://openairdocs.org/jasc/7230)
- Part: Compressor Blade
- Condition: Damaged
- Location: Nr 1 Engine
- Stage of operation: CL
- How discovered: O
- Nature of condition: E
- Precautionary procedure: E, J, A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/IPXA2016122812205

## Discrepancy

AFTER TAKE OFF, HEARD 3 LOUD BANGS FROM THE NR 1 ENG ACCOMPANIED WITH SHARP YAWING. EMERGENCY DECLARED, LANDED UNEVENTFULLY.   SIGNIFICANT DAMAGE FOUND ON STAGE 12HPC. . R & R THE NR 1 ENGINE.

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