# SDR 9WGA2026042725802

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 25, 2026
- Submitted: April 27, 2026
- Operation: Air carrier
- Aircraft: [N258SN](https://openairdocs.org/aircraft/N258SN), registered now
- Make and model: Boeing 747-400
- Registry model: [Boeing 747-400](https://openairdocs.org/model/boeing-747-400) (OpenAirDocs)
- Aircraft serial: 29258
- Aircraft time: 94,698 hours, 15,226 cycles
- System (JASC): [5730 · Wing, Plate/Skin](https://openairdocs.org/jasc/5730)
- Part: Skin
- Condition: Corroded
- Location: Zone 600 Te
- 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/9WGA2026042725802

## Discrepancy

RIGHT HAND WING UPPER SURFACE TRAILING EDGE SIDE WAS FOUND WITH CORROSION FROM STA ERSS 1646.716 TO WBL 1247,  DURING HEAVY CHECK, PER WO 15698, NRC 940659, SEQ 459, PERFORMED BLEND AREA RH WING UPPER SURFACE T/E SIDE FROM STA ERSS 1646.716 TO WBC 1241 (1687 - 1694) IAW B747-400 SRM 51-10-02, SRM 57-20-01, BOEING WGN-WGN 26-0023-068 AND RDR WGN-WGN-26-0023-09B, ISSUED WGA REP-44-258-189

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.