Abstract: A technique of fault management mechanism was proposed in this paper.Based on the platform of PowerPC series processor and the embedded real-time operating system AcoreOS653 which follows ARINC653 standard, this scheme includes four parts: dynamical fault codes registration, fault detection, fault recording and records check.An algorithm of the scheme was designed based on Interrupt functions unit and watchdog circuit.The results prove that the technique is effective and has good flexibility and portability.It is of great significance to improve the safety of airborne system.