# SDR UIEA200700047

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 2, 2007
- Submitted: February 5, 2007
- Operation: Air carrier
- Aircraft: N355MC
- Make and model: Boeing 747341
- Aircraft serial: 23395
- Aircraft time: 62,240 hours, 12,403 cycles
- Engine: Ge CF650E2
- System (JASC): [5414 · Nacelle/Pylon, Plate/Skin](https://openairdocs.org/jasc/5414)
- Part: Skin
- Part number: 65B940512
- Condition: Cracked
- Location: Nr 2 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/UIEA200700047

## Discrepancy

NR 2 PYLON PRECOOLER EXHAUST CUT-OUT CRACKED AT LOWER AFT CORNER AT NAC 248.  THE SKIN ASSEMBLY CRACKS WERE REMOVED BY TRIMMING.  THE NR 3 STIFFENER WAS REINFORCED WITH A SUPPLEMENTARY STEEL LOWER ANGLE FROM NAC STATION 235 TO 254.  THE RIB INSTALLATION AT NAC STATION 248 WAS MODIFIED TO ACCOMMODATE THE STEEL REPAIR ANGLE INSTALLED ON THE NR 3 STIFFENER.  REPAIRED AREAS WERE NDT INSPECTED.

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