# SDR 20010606CW004

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 12, 2001
- Submitted: June 6, 2001
- Operation: General aviation
- Aircraft: [N7031Z](https://openairdocs.org/aircraft/N7031Z), registered now
- Make and model: Piper PA-25-235
- Registry model: [Piper PA-25-235](https://openairdocs.org/model/piper-pa-25-235) (OpenAirDocs)
- Aircraft serial: 252791
- System (JASC): [5720 · Wing Miscellaneous Structure](https://openairdocs.org/jasc/5720)
- Part: Doubler
- Part number: 6418800
- Condition: Corroded
- Location: Lt Wing
- 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/20010606CW004

## Discrepancy

WING WAS BEING DISASSEMBLED FOR RIB REPLACEMENT.  REINFORCEMENT PLATE WAS DRILLED OFF AND CORROSION FOUND ON AFT FACE OF SPAR WEB AND FACE OF REINFORCEMENT PLATE.  CAUSE:  MOISTURE WICKING BETWEEN PLATES AND LACK OF CORROSION PROTECTION.

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