# SDR CA020801012

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 24, 2002
- Submitted: August 7, 2002
- Operation: Air carrier
- Make and model: Snias AS350B1
- Aircraft time: 3,275 hours
- Engine: Tmeca ARRIEL1D1
- System (JASC): [6520 · Tail Rotor Gearbox](https://openairdocs.org/jasc/6520)
- Part: Bevel Gear
- Part number: 350A33020005
- Condition: Failed
- Location: Tailrotor Drive
- Stage of operation: IN
- How discovered: V
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/CA020801012

## Discrepancy

(CAN) TAILROTOR GEARBOX BEVEL GEAR - LOSS OF TORQUE ATTACHING IT TO THE OUTPUT DRIVE SHAFT - ALL THE BOLTS WERE LOOSE CAUSING EXTREME BACKLASH IN GEAR SET. FOUND DURING GEARBOX REMOVAL/INSTALLATION.  THE INPUT PINION, OUTPUT BEVEL GEAR, OUTPUT SHAFT ALL SCRAPED.

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