# SDR 96ZZZX5085

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 30, 1996
- Submitted: March 26, 2000
- Operation: Air carrier
- Aircraft: [N350SL](https://openairdocs.org/aircraft/N350SL), registered now
- Make and model: Snias AS350BA
- Aircraft serial: 2782
- System (JASC): [6320 · Main Rotor Gearbox](https://openairdocs.org/jasc/6320)
- Part: Main Gearbox
- Part number: 3203004
- Condition: Defective
- Location: Xmsn Deck
- 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/96ZZZX5085

## Discrepancy

TROUBLESHOOTING VIBRATION PROBLEM DISCOVERED TRANSMISSION INPUT PINION SHAFT WAS LOOSE.  REMOVED SHORT SHAFT AND RELATED ACCESSORIES AND FOUND INPUT PINION SHAFT HAD LOSS OF PRE-LOAD TORQUE.  INPUT PINION SHAFT NUT PN DH5439-111-42 STILL APPEARED TIGHT, BUT ROTOR BRAKE DISC HAD AXIAL PLAY OF .055 INCH.  REMOVED BEVEL REDUCTION GEARBOX  PN 350A32-0300-04 AND REPLACED WITH SERVICABLE UNIT.

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