# SDR UIEA2018120902804

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 7, 2018
- Submitted: December 11, 2018
- Operation: Air carrier
- Aircraft: [N446MC](https://openairdocs.org/aircraft/N446MC), registered now
- Make and model: Boeing 747-4B5F
- Registry model: [Boeing 747-4B5F](https://openairdocs.org/model/boeing-747-4b5f) (OpenAirDocs)
- Aircraft serial: 33517
- Aircraft time: 63,148 hours, 11,034 cycles
- Engine: Pwa PW4062
- System (JASC): [7230 · Turbine Engine Compressor Section](https://openairdocs.org/jasc/7230)
- Part: Blades
- Part number: 56A621
- Condition: Damaged
- Location: Nr 1 Engine
- Stage of operation: IN
- How discovered: O
- Nature of condition: C, E
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/UIEA2018120902804

## Discrepancy

ON WALK AROUND FOUND DAMAGE TO NR 1 ENGINE. REMOVED AND REPLACED COMPLETE FAN SET ON ENGINE NR 1 IAW AMM 72-31-02-4. HIGH POWER ENGINE RUN ACCOMPLISHED. NO FURTHER VIBE FELT.

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