# SDR 2026F00037

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 19, 2026
- Submitted: March 19, 2026
- Operation: General aviation
- Aircraft: [N339QS](https://openairdocs.org/aircraft/N339QS), registered now
- Make and model: Cessna 680A
- Registry model: [Cessna 680A](https://openairdocs.org/model/cessna-680a) (OpenAirDocs)
- Aircraft serial: 6800191
- Aircraft time: 14,278 hours, 9,522 cycles
- System (JASC): [5313 · Fuselage Main, Longeron/Stringer](https://openairdocs.org/jasc/5313)
- Part: Stringer
- Condition: Corroded
- Location: Zone
- 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/2026F00037

## Discrepancy

FOUND SEVERAL AREAS OF CORROSION ON UPPER STRINGER INSIDE PANEL 652DB. MECHANICALLY REMOVED SEVERAL AREAS OF CORROSION ON UPPER STRINGER INSIDE PANEL 652DB, AFT AREA, FWD EDGE OF STRINGER, FROM INBD EDGE CONTINUING APPROXIMATELY 12 INCHES IN LENGTH GOING OUTBD IAW SRM 51-70-02. FOUND CORROSION BLENDS TO BE BEYOND LIMITS IAW SRM 51-70-02 EXCEEDING .002" OF MATERIAL REMOVED FROM NOMINAL THICKNESS. REPAIRED CORROSION BLENDS IAW AQRD RFTS-116431 REV.0 TITLE: N339QS (680-0191) UPPER AFT STRINGER INSIDE PANEL BAY 652DB CORROSION, DATE: 04MAR26.

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