# SDR UIEA200700046

- 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: 65B941004
- Condition: Cracked
- Location: Nr 1 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/UIEA200700046

## Discrepancy

NR 1 PYLON PRECOOLER EXHAUST CUT-OUT CRACKED AT AFT CORNER STATION 248.  THE SKIN ASSEMBLY AND WINDOW STRAPS WERE TRIMMED TO REMOVE CRACKS.  NET FIT ALUMINUM FILLERS WERE INSTALLED AT ALL TRIMMED AREAS.  REPAIR WAS NDT INSPECTED.  THE NR 3 STIFFENER WAS REINFORCED WITH A NEW STEEL LOWER REPAIR ANGLE FROM NAC STATION 235 TO 259.  THE RIB INSTALLATION AT NAC STATION 248 WAS MODIFIED TO ACCOMMODATE THE NEW LOWER STEEL REPAIR ANGLE INSTALLATION ON THE MODIFIED STIFFENER.

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