# SDR UIEA2011101900573

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 12, 2011
- Submitted: October 19, 2011
- Operation: Air carrier
- Aircraft: [N429MC](https://openairdocs.org/aircraft/N429MC), registered now
- Make and model: Boeing 747481
- Aircraft serial: 24833
- Aircraft time: 85,297 hours, 11,757 cycles
- System (JASC): [5414 · Nacelle/Pylon, Plate/Skin](https://openairdocs.org/jasc/5414)
- Part: Skin
- Condition: Cracked
- Location: Nacelle
- 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/UIEA2011101900573

## Discrepancy

DURING MX WALKAROUND, MX FOUND A CRACK WHICH IS APPROX 8" LONG AND 4" WIDE ON THE NR 4 ENGINE CORE COWL SKIN.   MX FOUND A 4" SECTION OF THE LT CORE COWL L/E RUB STRIP BROKEN OFF.  THIS COINCIDES WITH THE 4" SCRATCH MARKINGS ACROSS THE L/E OF THE DAMAGED AREA WHICH IS AFT OF THIS RUB STRIP.  THE LENGTH OF THE CRACK AND THE MISSING RUB STRIP EXCEEDS THE SRM LIMITS.

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