# SDR 2025FA0000255

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 8, 2025
- Submitted: April 8, 2025
- Operation: General aviation
- Aircraft: [N747EF](https://openairdocs.org/aircraft/N747EF), registered now
- Make and model: Boeing 747-8
- Registry model: [Boeing 747-8](https://openairdocs.org/model/boeing-747-8) (OpenAirDocs)
- Aircraft serial: 40906
- Aircraft time: 29,857 hours, 3,197 cycles
- System (JASC): [5730 · Wing, Plate/Skin](https://openairdocs.org/jasc/5730)
- Part: Panel
- Part number: 115U5424
- Condition: Cracked
- Location: Zone 500
- Part time: 29,857 hours, 3,197 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/2025FA0000255

## Discrepancy

LH WING UPPER SKIN PANEL FOUND CRACKED, DELAMINATED, FOUND DURING INSPECTION PER B223914; EXTERNAL - GV: WING UPPER SKIN PANELS. TO INCLUDE: FORWARD OF LEADING EDGE SPAR, FRONT SPAR TO REAR SPAR, & AFT OF REAR SPAR. ACCESS NOTE: UPPER WING SKIN LOWER SURFACE - VISIBLE IN LEADING EDGE BAYS WITH LEADING EDGE DEVICES EXTENDED / VISIBLE IN TRAILING EDGE BAYS WITH FLAPS, SPEED BRAKES AND SPOILERS EXTENDED MPD: 57-425-01

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