MOC 4 VTOL.2300 Common Mode Failures and Errors in Fly-by Wire Flight Control Functions

• n/a found in: Small Category VCA (Revision 0) SC-VTOL (Oct 2024)

MOC 4 VTOL.2300 Common Mode Failures and Errors in Fly-by Wire Flight Control Functions n/a To demonstrate compliance with [VTOL.2300](#_DxCrossRefBm1877490411), in line with [VTOL.2510](#_DxCrossRefBm1877490363), specific attention should be paid to common mode failures and errors in flight controls. The considerations on common modes in Section 9 (b) of [MOC VTOL.2510](#_DxCrossRefBm1877490370) apply, supplemented by the following for fly-by-wire flight controls: (a) Full reliance on Development Assurance and Quality Assurance as sole mitigation of a common mode failure or error leading to a total loss of flight controls function shall be avoided as far as practicable. Additional architectural mitigations that provide functional independence and/or item development independence should be provided. (b) It is recognized that dissimilarity in the High-level specifications of Flight Control Laws in a Command/Monitoring (COM/MON) architecture may not be easy to implement. Monitoring of the Flight Control Laws may be a possible mitigation means against common mode errors in such case.