# SDR UIEA2012042000156

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 20, 2012
- Submitted: April 20, 2012
- Operation: Air carrier
- Aircraft: [N492MC](https://openairdocs.org/aircraft/N492MC), registered now
- Make and model: Boeing 747-47UF
- Registry model: [Boeing 747-47UF](https://openairdocs.org/model/boeing-747-47uf) (OpenAirDocs)
- Aircraft serial: 29253
- Aircraft time: 58,654 hours, 10,431 cycles
- Engine: Ge CF680C2B1F
- System (JASC): [7230 · Turbine Engine Compressor Section](https://openairdocs.org/jasc/7230)
- Part: Rotor
- Condition: Damaged
- Location: Compressor
- Stage of operation: CL
- How discovered: O
- Nature of condition: R, J
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/UIEA2012042000156

## Discrepancy

AFTER TAKEOFF, EXPERIENCED COMPRESSOR STALL ON NR 1 ENGINE, FOLLOWED BY 2 MORE COMPRESSOR STALLS.  INSPECTION OF ENGINE ACCOMPLISHED IAW AMM 72-00-00.  DAMAGE TO STAGE 5 VSV WITH 1 BROKEN, LEVER FOUND.  DURING BORESCOPE DAMAGE TO 6TH, 7TH AND 8TH;  STAGE COMPRESSOR ROTORS.

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