# SDR 95ZZZX4096

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 6, 1995
- Submitted: March 26, 2000
- Operation: General aviation
- Aircraft: [N397AL](https://openairdocs.org/aircraft/N397AL), registered now
- Make and model: Bell 412
- Registry model: [Bell 412](https://openairdocs.org/model/bell-412) (OpenAirDocs)
- Aircraft serial: 36012
- System (JASC): [5412 · Nacelle/Pylon, Bulkhead/Firewall](https://openairdocs.org/jasc/5412)
- Part: Firewall
- Part number: 212060901203
- Condition: Corroded
- Location: Straps
- Stage of operation: IN
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/95ZZZX4096

## Discrepancy

DURING REPLACEMENT OF ENGINE SERVICE DECK, FOUND THE STRAPS ON UPPER FIREWALL WHERE THE AIR MANAGEMENT SYSTEM BOLTS ON, HAD SEVERE CORROSION.  CAUSED BY ALUMINUM BEING SANDWICHED BETWEEN STAINLESS STEEL.  SUSPECT CAUSED DISSIMILAR METAL CORROSION.

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