# SDR UIEA2026081300755

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 1, 2026
- Submitted: September 1, 2026
- Operation: Air carrier
- Aircraft: [N489MC](https://openairdocs.org/aircraft/N489MC), registered now
- Make and model: Boeing 747412F
- Aircraft serial: 26553
- Aircraft time: 122,398 hours, 21,317 cycles
- System (JASC): [5414 · Nacelle/Pylon, Plate/Skin](https://openairdocs.org/jasc/5414)
- Part: Skin Panel
- Part number: 321U441052
- 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/UIEA2026081300755

## Discrepancy

NR 1 PYLON NAC STA 228 INBD STRUT SKIN PANEL 452ER CUTOUT CRACKED.  CAT C TIME LIMITED REPAIR.   CARRIED OUT PERMANENT REPAIR IAW EO 1954A122 IAW SRM 54-50-01, REPAIR 2, & RI-54-50-18436, REV B.  NO FURTHER DEFECTS NOTED.

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