# SDR 97ZZZX4712

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 21, 1997
- Submitted: March 26, 2000
- Operation: Air carrier
- Make and model: Bolkms BK117A3
- System (JASC): [6320 · Main Rotor Gearbox](https://openairdocs.org/jasc/6320)
- Part: Bevel Wheel
- Part number: 4639311042
- Condition: Mismanufacutred
- Location: Transmission
- 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/97ZZZX4712

## Discrepancy

TRANSMISSION BEVEL WHEEL REJECTED NEW OUT-OF-BOX.  UNABLE TO GET ACCEPTABLE GEAR PATTERN.  INSTALLED IN 2 DIFFERENT GEARBOXES WITHOUT SUCCESS (SAME RESULTS).  THE CONTACT PATTERN IS ALWAYS OFF THE TOE.  REPLACED WITH NEW UNIT, CORRECT PROBLEM.

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