Futaba FUAS3097 Replacement Outer Case for S3401/S9404 - EBS3221  [FUAS3097]

Service replacement for S3401 and S9404 units

The Futaba FUAS3097 case set, identified by part code EBS3221, is intended for Futaba S3401 and S9404 radio-control servos. Supplied without retail packaging, the kit provides the external housing used during maintenance and repair operations on these servos.

This case is useful when the original shell is damaged or when you want a spare ready for quick swap-outs. Service tasks typically include removing the old case, transferring the internal gearbox and electronics into the new housing, and reassembling. The product is offered as an external component rather than a complete servo.

Workshop guidance: keep fasteners sorted, note gear positions before removal, and use a clean bench to avoid contaminating internal components. Carrying spare housings reduces bench time and helps keep vehicles running during setup and testing.

Impact on setup: replacing the housing will not alter servo response or gearing; its purpose is to restore mechanical protection and mounting integrity so tuning work can continue without interruption.