# SDR 97ZZZX913

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 4, 1997
- Submitted: March 26, 2000
- Operation: General aviation
- Aircraft: [N76FL](https://openairdocs.org/aircraft/N76FL), registered now
- Make and model: Skrsky S76B
- Aircraft serial: 760347
- System (JASC): [6320 · Main Rotor Gearbox](https://openairdocs.org/jasc/6320)
- Part: Housing
- Part number: 7635109002050
- Condition: Cracked
- Location: M/R Gearbox
- Part time: 2,117 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/97ZZZX913

## Discrepancy

WHILE DOING THE ZONE 5 INSPECTION, FOUND A CRACK IN THE UPPER MAIN GEARBOX HOUSING JUST AFT OF THE RIGHT REAR SUPPORT LEG.  THE CRACK WAS FOUND IN THE AREA SHOWN IN CHAPTER 5-20-00, PAGE 23, FIGURE 16.  THE MAIN GEARBOX WILL BE CHANGED TO FIX THIS PROBLEM.  AIRCRAFT TOTAL TIME 2,128.7 HOURS.  M/R GEARBOX P/N 7635109600042.

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