| 1991 | Ing. Karel Šíma sets out as an independent maintenance engineer for Walter Minor III engines |
| 1994 | W-Motor Service s.r.o. starts its operations at the Bubovice airfield and obtains maintenance approvals for Walter Minor, LOM Praha M137/337/332, Lycoming and Continental engines, light aircraft, ground testing of piston engines up to 300 kW, and fabrication of cable harnesses and fuel/oil system components for Walter Minor and LOM engines |
| 1995 | Maintenance approval recognised by Slovakia |
| 1998 | Maintenance approval recognised by Hungary |
| 1998 | Approval obtained for non-destructive testing by magnetic particle and liquid penetrant methods |
| 1998 | Approval obtained for propeller maintenance (no longer active) |
| 1998 | Approval obtained for specialised aircraft operations (no longer active) |
| 1998 | Approval obtained for pilot training (no longer active) |
| 1999 | Approval obtained for M601 turbine engine maintenance |
| 1999 | WMS is accredited by LOM Praha as a piston engine maintenance centre |
| 2004 | Test cells for turbine engines up to 700 kW and piston engines up to 1500 kW are commissioned |
| 2005 | Czech national design organisation approval obtained for Walter Minor, LOM and historical engine types (including turbines) |
| 2005 | Part-147 maintenance training organisation approval obtained (no longer active) |
| 2006 | EASA Part M Subpart F approval (CZ.MF.0026) obtained |
| 2011 | EASA STC 10033420 obtained for life extension of LOM M137/337/332 engines (in cooperation with Parma-Technik design organisation) |
| 2018 | EASA STC 10067113 obtained for alternative overhaul and revision procedures for LOM M137/337/332 engines (in cooperation with Parma-Technik design organisation) |
| 2024 | EASA APDOA approval for piston engines (EASA.AP549) obtained |
