# SDR 97ZZZX2376

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 12, 1997
- Submitted: March 26, 2000
- Operation: General aviation
- Aircraft: [N412WP](https://openairdocs.org/aircraft/N412WP), registered now
- Make and model: Bell 412
- Registry model: [Bell 412](https://openairdocs.org/model/bell-412) (OpenAirDocs)
- Aircraft serial: 33170
- System (JASC): [6310 · Engine/Transmission Coupling](https://openairdocs.org/jasc/6310)
- Part: Coupling
- Part number: 212040687001
- Condition: Pitted
- Location: Main Drive
- Part time: 91 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/97ZZZX2376

## Discrepancy

ACFT TT 2,225.8 HOURS.  ON A 6-MONTH (180 DAY) INSPECTION, M/D/SHAFT WAS REMOVED FOR INSPECTION AND REPACK OF GREASE COUPLINGS.  BOTH INNER GEARS AND BOTH OUTER COUPLINGS WERE FOUND WITH CORROSION AND PITTING.  TOTAL TIME ON M/D/SHAFT WAS 91.3 HOURS SINCE NEW AND 6 MONTHS SINCE INSTALLATION.  BELL HELICOPTER WAS NOTIFIED AND NEW PARTS INSTALLED.

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