| Number | Date | Description | ||
| 2020 | ||||
| Service bulletin SB_SD4-01-2019 | 2020/01/09 | Introduction of Oil Hoses CONTI OLN M4M-2 for oil system of Rotax 912 S2 / ULS2 engines installed on Viper SD-4 RTC and Viper SD-4 Night-VFR aircrafts | ||
| 2019 | ||||
| Service bulletin SB_SD4-01-2019 | 2019/08/09 | Replacement of circlip Rotax part no. 945785 installed in both carburetors for ROTAX Engine Type 912 ULS series | ||
| 2018 | ||||
|
Service bulletin SB SD4-06-2017-R2 |
2018/02/12 |
|||
| 2017 | ||||
|
Service bulletin SB SD4-01-2017-R1 |
2017/12/12 |
*Service bulletins for ROTAX 912S2 serie engines can be found HERE
*Service bulletins for DUC Hélices propellers can be found HERE