# SDR U2RA201706130003

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 28, 2017
- Submitted: June 14, 2017
- Operation: Air carrier
- Aircraft: [N919CA](https://openairdocs.org/aircraft/N919CA), registered now
- Make and model: Boeing 747428
- Aircraft serial: 25302
- Aircraft time: 89,251 hours, 13,055 cycles
- Engine: Ge CF680C2B1F
- System (JASC): [5414 · Nacelle/Pylon, Plate/Skin](https://openairdocs.org/jasc/5414)
- Part: Skin
- Condition: Chafed
- Location: Nr 4 Nacelle
- Part time: 89,251 hours, 13,055 cycles
- Stage of operation: IN
- How discovered: V
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/U2RA201706130003

## Discrepancy

DURING A D CHECK INSPECTION,  FOUND THE NR 4 ENGINE OTBD CORE COWL WITH WEAR GROOVE AT PRE-COOLER EXHAUST DUCT OPENING.  REPAIRED IAW EO MAS-J217-N919CA-004.

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