# SDR JGVR20201208001

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 8, 2020
- Submitted: December 8, 2020
- Operation: General aviation
- Aircraft: [N389QS](https://openairdocs.org/aircraft/N389QS), registered now
- Make and model: Cessna 680A
- Registry model: [Cessna 680A](https://openairdocs.org/model/cessna-680a) (OpenAirDocs)
- Aircraft serial: 6800149
- Aircraft time: 12,277 hours, 8,082 cycles
- System (JASC): [5531 · Vertical Stabilizer, Spar/Rib](https://openairdocs.org/jasc/5531)
- Part: Spar
- Condition: Corroded
- Location: Vertical Stab
- 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/JGVR20201208001

## Discrepancy

2 AREAS OF CONFIRMED CORROSION ON VERTICAL STAB SPAR RT AFT SPAR CLIP.  MECHANICALLY AND HAND SANDED 1 AREA OF CORROSION LOCATED ON VERTICAL STAB RT AFT SPAR CLIP ON UPPER END AT 1ST RIVET AND 1 AREA OF CORROSION LOCATED 3RD RIVET BELOW UPPER RUDDER HINGE ON RT SPAR CLIP ON AFT SPAR VERTICAL STAB.  FOUND CORROSION BLENDS TO BE EXCEEDING C680 SRM 51-70-02 LIMITATIONS OF NO MORE .002" OF NOMINAL MATERIAL MATERIAL ALLOWED.  SUBMITTED FINDINGS TO ENGINEERING.  REPAIRED CORROSION BLENDS, IAW TEXTRON ENGINEERING MEMO, REF DQ28042M1 SUBJECT: VERTICAL STABILIZER AFT SPAR CAP CORROSION DATED: DECEMBER 4, 2020.  NO ADDITIONAL RIVETS REQUIRED REPLACEMENT BEYOND RIVETS REMOVED AND NO VISUAL CORROSION IDENTIFIED INSIDE RIVET HOLES WHERE RIVETS WERE REMOVED.

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