# SDR CA020213012

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 25, 2002
- Submitted: March 4, 2002
- Operation: General aviation
- Make and model: Bell 427
- Registry model: [Bell 427](https://openairdocs.org/model/bell-helicopter-textron-canada-427) (OpenAirDocs)
- Engine: Pwc PW207D
- System (JASC): [7920 · Engine Oil Distribution (Airframe Furnished)](https://openairdocs.org/jasc/7920)
- Part: Line
- Part number: 427065244101
- Condition: Chafed
- Location: Engine Oil
- 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/CA020213012

## Discrepancy

(CAN) DURING MODIFICATION OF AIRCRAFT,  NR 2 ENGINE  OIL LINES WERE REMOVED. UPON REMOVAL OF LINES IT WAS OBSERVED THAT THE MAIN OIL FEED LINE (FROM OIL COOLER) WAS CHAFED TO A DEPTH OF 0.004 INCH. THE CHAFING OCCURRED IN THE AREA BELOW THE FORWARD ENGINE FIREWALL. THE FIREWALL HAS A STAINLESS STEEL 'TUNNEL' WHICH THE OIL LINES PASS THROUGH. THE FORWARD OUTBOARD EDGE OF THIS TUNNEL CHAFED INTO THE ALUMINUM OIL TUBE. THIS TUBE WAS REMOVED FROM SERVICE.

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