# SDR 97ZZZX4428

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 9, 1997
- Submitted: March 26, 2000
- Operation: General aviation
- Aircraft: [N365AL](https://openairdocs.org/aircraft/N365AL), registered now
- Make and model: Bell 206L-3
- Registry model: [Bell 206L-3](https://openairdocs.org/model/bell-206l-3) (OpenAirDocs)
- Aircraft serial: 51376
- System (JASC): [6220 · Main Rotor Head](https://openairdocs.org/jasc/6220)
- Part: Hub
- Part number: 206011100159
- Condition: Corroded
- Location: M/R Hub
- Part time: 2,388 hours
- Component: 206011100159
- 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/97ZZZX4428

## Discrepancy

DEFECT DISCOVERED AT 1,200 HOUR INSPECTION.  FOUND PITTING CORROSION I  SPLINES OF TRUNNION.  SUBMITTER STATES MANUFACTURER'S RECOMMENDED LUBRICANT NOT SUFFICIENT.  RECOMMEND A SUFFICIENT LUBRICANT FOR THIS APPLICATION.  MANUFACTURER SPECIFIES MIL-C-16173 GRADE 2 ON MAST TO TRUNNION SPLINES.  BELIEVE A HEAVY GREASE WOULD HOLD UP BETTER IN THIS LOCATION.

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