# SDR UIEA00053

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 16, 2000
- Submitted: February 1, 2001
- Operation: Air carrier
- Aircraft: [N516MC](https://openairdocs.org/aircraft/N516MC), registered now
- Make and model: Boeing 747243B
- Aircraft serial: 22507
- Engine: Ge CF650E2
- System (JASC): [7250 · Turbine Section](https://openairdocs.org/jasc/7250)
- Part: Turbine
- Condition: Failed
- Location: Nr 4 Engine
- Stage of operation: CR
- How discovered: O
- Nature of condition: Y
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/UIEA00053

## Discrepancy

ATB - FLT 3120 - CREW HEARD A LOUD BANG FROM RIGHT SIDE OF AIRCRAFT, THEN NR 4 ENGINE SHUTOFF.  UPON RETURN TO LAX, IT WAS DISCOVERED THAT NR 4 ENGINE TURBINE SECTION HAS FAILED AND THE ENGINE HAS INTERNAL DAMAGE.  SEVERAL BLADES FOUND DAMAGED DURING BORESCOPE INSPECTION.  IN ADDITION, THE ENGINE CASE WAS DAMAGED.  REPLACED NR 4 ENGINE AND PERFORMED ALL APPLICABLE INSPECTINS AND MAINTENANCE CHECKS.  NO ABNORMALITIES OBSERVED.  ENGINE RUN UP SATISFACTORY.  (M)

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