# SDR UIEA2017020700156

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 7, 2017
- Submitted: February 10, 2017
- Operation: Air carrier
- Aircraft: [N477MC](https://openairdocs.org/aircraft/N477MC), registered now
- Make and model: Boeing 747-47UF
- Registry model: [Boeing 747-47UF](https://openairdocs.org/model/boeing-747-47uf) (OpenAirDocs)
- Aircraft serial: 29255
- Aircraft time: 74,083 hours, 13,327 cycles
- Engine: Ge CF680
- System (JASC): [7230 · Turbine Engine Compressor Section](https://openairdocs.org/jasc/7230)
- Part: Compressor
- Condition: Stalled
- Location: Lt Engine
- 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/UIEA2017020700156

## Discrepancy

AFTER TAKEOFF, EXPERIENCED A LT ENGINE COMPRESSOR STALL, NO ENGINE INDICATIONS DISPLAYED.  INSPECTED EXHAUST FOR FOD, BOROSCOPED HPC STAGE 1, 6, AND 12 AND HPT STAGE 1 ALC IAW AMM 72.00.00.  REMOVED AND INSTALLED BOROSCOPE PLUGS AND N2 DRIVE PAD IAW AMM 72.00.00 INSPECTED.

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