Establishment method of civil aircraft abnormal operation procedure items

Abnormal procedures are the important basis for the flight crew to handle emergency conditions. There is no current establishment method of procedures items，which makes redundancy or omission may easily occur in the procedure items. The abnormal procedures are divided into four types，including airworthiness regulation，function failure，route operation factor and model feature procedures. The corresponding procedure items establishment methods are proposed. Learned from similar types and other methods，abnormal operation procedures are established，based on "operation requirements"，through regulation inquiry，system security analysis，failure mode and effect analysis（FMEA）and functional hazard analysis（FHA），which can obtain the more accurate results. And then this result is iterated to optimize the CAS design. This method is applied to establish procedure items to develop some domestic civil aircraft fuel system abnormal operation procedures，and it makes the design result more in line with expectations of pilots.