# SDR 99ZZZX4369

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 28, 1999
- Submitted: March 26, 2000
- Operation: General aviation
- Aircraft: N602FF
- Make and model: Boeing 747124
- Aircraft serial: 19734
- System (JASC): [5730 · Wing, Plate/Skin](https://openairdocs.org/jasc/5730)
- Part: Skin
- Condition: Corroded
- Location: Wing
- Stage of operation: IN
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/99ZZZX4369

## Discrepancy

DURING MAINTENANCE C-CHECK, BEJ FOUND SEVERE CORROSION ON THE UPPER SURFACE OF THE WING CENTER SECTION (WCS) UPPER SKIN AT BS 1110, LBBL 11.33, AND BETWEEN UPPER STR S18C AND STR S19C.

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