# SDR UIEA2013012300026

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 20, 2013
- Submitted: February 18, 2013
- Operation: Air carrier
- Aircraft: [N412MC](https://openairdocs.org/aircraft/N412MC), registered now
- Make and model: Boeing 747-47UF
- Registry model: [Boeing 747-47UF](https://openairdocs.org/model/boeing-747-47uf) (OpenAirDocs)
- Aircraft serial: 30559
- Aircraft time: 56,660 hours, 8,522 cycles
- Engine: Ge CF680C2B1F
- System (JASC): [7800 · Engine Exhaust System](https://openairdocs.org/jasc/7800)
- Part: Ring
- Condition: Cracked
- Location: Nr 4 Engine
- Stage of operation: IN
- How discovered: V
- Nature of condition: O
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/UIEA2013012300026

## Discrepancy

NR 4 ENG RT 'C' DUCT AFT CASCADE SUPPORT RING FOUND CRACKED AT R8 CASCADE VANE NUT PLATE.  REPAIRED AS PER EO 1978A067.

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