We are pleased to announce the availability of the following draft EUROCAE document prepared by EUROCAE WG-112 VTOL (SG-2 Lift – Thrust):
- ED-ED-334A: Guidance for Common mode analysis for lift – thrust system for VTOL enhanced category.
ED-334 contains the results of discussions and considerations regarding Common Mode Analysis (CMA) application for Lift Thrust System for eVTOL (electric vetical take-off landing aicraft). The objective is to give guidance for the application of Special Condition for VTOL and proposed Means of Compliance Special Condition for VTOL considering the enhanced category. The Special Condition VTOL and Means Of Compliance 4 Special Condition VTOL respectively require the no single failure criteria paying particular attention to common cause failures, including common mode errors and cascading failures in Means Of Compliance VTOL.2510.7b when independence cannot be shown. In addition, Means Of Compliance 4 VTOL.2300 gives a special focus on Fly by Wire, highlighting the need for high integrity and availability.
Compared to ED-334 initial issue, this issue A adds on top of Propellers and Batteries examples, a third example for CMA discussion. This third example, detailed in chapter 7, is focusing on e-motors. The other chapters of the document are technically unchanged compared to the initial issue; only limiting re-numbering of chapters has been locally performed in order to have a more consistent presentation of the three examples .
You are invited to review the proposed draft on the EUROCAE Workspace and complete the comment form. If you are a non-member of EUROCAE, please register here (and click on “Access only to Open Consultation”). Early replies are encouraged.
End Date: 22/01/2026.