# SDR 20000405SH024

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 1, 2000
- Submitted: April 5, 2000
- Operation: General aviation
- Aircraft: N611BP
- Make and model: Doug 600N
- Registry model: [Doug 600N](https://openairdocs.org/model/mcdonnell-douglas-helicopter-600n) (OpenAirDocs)
- Aircraft serial: RN041
- System (JASC): [5412 · Nacelle/Pylon, Bulkhead/Firewall](https://openairdocs.org/jasc/5412)
- Part: Firewall
- Condition: Chafed
- Location: Engine Bay
- Stage of operation: IN
- How discovered: O
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/20000405SH024

## Discrepancy

AFTER REMOVING THE ENGINE FOR FOD, NOTICED THERE WERE TWO RUBBED INDENTATIONS TO THE UPPER LEFT PORTION OF THE FIREWALL.  UPON FURTHER INVESTIGATION, NOTED THE BLEED VALVE BOLT HEADS WERE WORN CONSIDERABLY.  THIS WAS THE ORIGINAL FACTORY INSTALLATION.  (X)

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