# SDR 97ZZZX4774

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 23, 1997
- Submitted: March 26, 2000
- Operation: General aviation
- Filed by: [Flexjet, LLC, repair station DJFR206D](https://openairdocs.org/faa-repair-station/DJFR206D/flexjet-llc.md) (OpenAirDocs)
- Engine: Garrtt TPE3315
- System (JASC): [7323 · Turbine Governor](https://openairdocs.org/jasc/7323)
- Part: Piston
- Part number: 8954932
- Condition: Leak
- Location: Turb Gov
- Component: Airesrch, 8954907
- Stage of operation: IN
- Nature of condition: W
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/97ZZZX4774

## Discrepancy

WHEN PARTS ARE MANUFACTURED, THEY ARE PAINTED WITH ZINC CHROMATE.  SUBMITTER HAS FOUND ON NEARLY EVERY GOVERNOR DISASSEMBLED FRAGMENTS AND LARGE AMOUNTS OF PAINT LODGED UNDER O-RINGS WHERE THEY CONTACT SEALING AREAS.  THEY CAUSE INTERNAL LEAKS AND EXTERNAL LEAKS AT THE CONTROL SHAFT.  RECOMMEND ELIMINATION OF CHROMATE PRIMER ON PISTON AND COVER ASSY.

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