# SDR U2RA2025010100013

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 1, 2025
- Submitted: February 20, 2025
- Operation: Air carrier
- Aircraft: [N729CA](https://openairdocs.org/aircraft/N729CA), registered now
- Make and model: Boeing 747428
- Aircraft serial: 25068
- Aircraft time: 97,345 hours, 16,757 cycles
- System (JASC): [5330 · Fuselage Main, Plate/Skin](https://openairdocs.org/jasc/5330)
- Part: Skin
- Part number: 65B0210012
- Condition: Dented
- Location: Zone 100
- Part time: 97,345 hours, 16,757 cycles
- 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/U2RA2025010100013

## Discrepancy

DURING AIRCRAFT HEAVY CHECK IN XMV (XIAMEN, CHINA), HAECO MAINTENANCE DISCOVERED (2 EA.) DENTS ON THE SECTION 46 FUSELAGE SKIN. SEE FIGURE 1 FOR DETAILS. THE DAMAGE WAS EVALUATED PER REF /A/ AND FOUND TO BE BEYOND PUBLISHED LIMITS (A/Y <30). THE SKIN IS MADE FROM 2024-T3 X 0.100 INCH THICK CLAD SHEET AND MACHINED TO 0.071 INCH MINIMUM PER REF /B/. THE SUBJECT IS SKIN IS CLASSIFIED AS PRIMARY STRUCTURE, A PSE, A SSI, AND FCBS (NOTE 1) PER REF /C/. NATIONAL AIRLINES CONTACTED FLIGHT VEHICLE CONSULTING FOR FURTHER EVALUATION AND REPAIR INSTRUCTIONS.

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