# SDR 96ZZZX846

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 6, 1996
- Submitted: March 26, 2000
- Operation: General aviation
- Filed by: [Hamilton Sundstrand World Wide Repair, repair station SI3R842L](https://openairdocs.org/faa-repair-station/SI3R842L/hamilton-sundstrand-world-wide-repair.md) (OpenAirDocs)
- Aircraft: N3903G
- Make and model: Saab SF340A
- Registry model: [Saab SF340A](https://openairdocs.org/model/saab-scania-sf340a) (OpenAirDocs)
- Aircraft serial: 340A0227
- Engine: Ge CT75A2
- System (JASC): [7210 · Turbine Engine Reduction Gear](https://openairdocs.org/jasc/7210)
- Part: Tab Washer
- Part number: 7895922
- Condition: Cracked
- Location: Gc49 Gearbox
- Part time: 11,548 hours
- Component: Hamstd, 775800
- 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/96ZZZX846

## Discrepancy

GEARBOX RETURNED TO HAMILTON STANDARD FOR FAILED BORESCOPE REPAIR.  AT DISASSEMBLY OF THE DRIVE (BULL) GEAR, HAMILTON STANDARD DISCOVERED THE TABBED WASHER WAS CRACKED.  THE CRACK IS ADJACENT TO A TAB AND EXTENDS THROUGH TO THE INSIDE DIAMETER TAB.  THE DRIVE GEAR RETENTION NUT REQUIRED 1,600 FEET/POUNDS OF TORQUE TO REMOVE.  THIS PART SUPERSEDED P/N 775796-4.

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