# SDR IPXA2B72577

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 20, 2012
- Submitted: March 26, 2012
- Operation: Air carrier
- Aircraft: [N579UP](https://openairdocs.org/aircraft/N579UP), registered now
- Make and model: Boeing 747-45E
- Registry model: [Boeing 747-45E](https://openairdocs.org/model/boeing-747-45e) (OpenAirDocs)
- Aircraft serial: 26062
- Engine: Ge CF680C2B1F
- System (JASC): [7230 · Turbine Engine Compressor Section](https://openairdocs.org/jasc/7230)
- Part: Blades
- Condition: Damaged
- Location: Nr 1 Engine
- Stage of operation: CL
- How discovered: O
- Nature of condition: J
- Precautionary procedure: J, A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/IPXA2B72577

## Discrepancy

ON GEAR RETRACTION AFTER TAKE OFF,  MULTIPLE ENGINE REPORTS LOUD AND ASSOCIATED VIBRATIONS ON ENG NR 1.  SHUTDOWN  NR 1 ENGINE IAW QRH.  DUMPED FUEL RETURNED TO DEPARTURE.  NO WING CAUTION MESSAGES OR ALERTS.  AFT INSPECTION,  FOUND 26 FAN BLADES DAMAGED.  R & R NR 1 ENGINE DUE TO DAMAGE BEYOND LIMITS.  REPLACEMENT CARRIED OUT IAW AMM 71-00-02-4 AND REPLACEMENT TEST CARRIED OUT. SATISFACTORY IAW AMM 71-00-00-705-156.

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