# SDR HAIHEEA9411

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 16, 1997
- Submitted: March 26, 2000
- Operation: Air carrier
- Aircraft: N754H
- Make and model: Bell 212
- Registry model: [Bell 212](https://openairdocs.org/model/bell-212) (OpenAirDocs)
- System (JASC): [6320 · Main Rotor Gearbox](https://openairdocs.org/jasc/6320)
- Part: Case Assy
- Part number: 212040506005
- Condition: Defective
- Location: M/R Gr Box
- Component: 212040003023
- 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/HAIHEEA9411

## Discrepancy

UNABLE TO OBTAIN ACCEPTABLE BACKLASH.  SHIM DIMENSIONS CHECK OK USING FORMULA FROM CR&O MANUAL, HOWEVER, BACKLASH STILL BELOW MINIMUM.

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