The Futaba FUAS3090 case set (AS3090 / EBS3094) comes without retail packing and provides a swap-in outer shell for S9102-series servos. It is meant for hobby radio-control servos where the existing enclosure is damaged or aged.
This case lets you transfer the internal servo assembly—PCB, gears, and output shaft—into a new shell. It is sold as a maintenance accessory for model-use only. Always check the S9102 marking on your servo to confirm correct fit before installation.
Installation steps: remove the servo from your model, open the old case, carefully lift out the electronics and gear stack as one unit if applicable, seat them into the replacement housing, and refasten with original screws. Verify horn seating and neutral position by briefly powering the servo at low throttle prior to final installation.
Notes for use: the replacement case assists with field servicing, repairs broken mounting tabs, and keeps servo mounting consistent during model setup and tuning across cars, boats, and aircraft at hobby scale.
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