# SDR UIEA2025071300947

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 14, 2025
- Submitted: July 17, 2025
- Operation: Air carrier
- Aircraft: [N489MC](https://openairdocs.org/aircraft/N489MC), registered now
- Make and model: Boeing 747412F
- Aircraft serial: 26553
- Aircraft time: 118,648 hours, 20,715 cycles
- System (JASC): [5410 · Nacelle/Pylon, Main Frame](https://openairdocs.org/jasc/5410)
- Part: Strut
- Condition: Cracked
- Location: Zone 400
- 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/UIEA2025071300947

## Discrepancy

NUMBER 1 PYLON INBOARD STRUT SKIN IS FOUND CRACKED AT 452ER PANEL, CUTOUT  LENGTH 1.2". NR 1 PYLON INBOARD STRUT SKIN CRACK AT 452ER PANEL CUTOUT AREA, REPAIRED IAW RI-54-50-17774 REV A. NO FURTHER DEFECTS NOTED.

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