# SDR 2026F00087

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 23, 2026
- Submitted: April 23, 2026
- Operation: General aviation
- Aircraft: [N339QS](https://openairdocs.org/aircraft/N339QS), registered now
- Make and model: Cessna 680CE
- Aircraft serial: 6800191
- Aircraft time: 14,278 hours, 9,522 cycles
- System (JASC): [5730 · Wing, Plate/Skin](https://openairdocs.org/jasc/5730)
- Part: Skin
- Condition: Corroded
- Location: Zone 100
- 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/2026F00087

## Discrepancy

CENTER WING LOWER SKIN IN PANEL BAY 175AC HAS 13 AREAS OF CORROSION. MECHANICALLY REMOVED CORROSION LOCATED WHERE 19 HI-LOK'S WERE PREVIOUSLY REMOVED ALONG WITH SMALL AREAS AROUND REMOVED HI-LOK'S LOCATED IN ACCESS BAY 175AC, LOWER CENTER WING SKIN, OUTER SURFACE IAW CESSNA 680 SRM 51-70-02. FOUND CORROSION BLENDS TO BE BEYOND LIMITS IAW CESSNA 680 SRM 51-70-02 EXCEEDING .002" OF MATERIAL REMOVED FROM NOMINAL THICKNESS. REPAIRED CORROSION BLENDS IAW NETJETS AQRD RFTS-116511 REV. 0, TITLE: N339QS ( 680-0191) CENTER WING LOWER SKIN CORROSION, DATE: 17MAR26.

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