# SDR CHI1753

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 20, 1997
- Submitted: March 26, 2000
- Operation: General aviation
- Aircraft: [N192CH](https://openairdocs.org/aircraft/N192CH), registered now
- Make and model: Kawski KV1072
- Aircraft serial: 4011
- System (JASC): [6210 · Main Rotor Blades](https://openairdocs.org/jasc/6210)
- Part: Blade
- Part number: 107R1202
- Condition: Vacuum Leak
- Location: M/R Spar
- Part time: 4,735 hours
- 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/CHI1753

## Discrepancy

EVACUATED BLADE SPAR INDICATOR SYSTEM (ISIS) SHOWED POSITIVE.  BLADE REMOVED FROM SERVICE TO INVESTIGATE SOURCE OF LEAK.  THE LEAK WAS DETERMINED COMING FROM A SMALL CORROSION PIT WHICH IS LOCATED IN A TOOLING MARK AT STA 252.  THE TOOLING MARK IS APPROXIMATELY 0.38 INCH IN LENGTH ON THE SURFACE OF THE SPAR.  REVIEW OF AUG 96 X-RAYS DID NOT REVEAL THE DEFECT.  THIS MINUTE DEFECT SHOWED THE EXCELLENT DETECTION CAPABILITIES OF THE ISIS SYSTEM.  (X)

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