Operational Hazards

A list of generic operational hazards is then produced based on the Failure Effects list, System Description documentation, analysis of previous operations, and risk assessment meetings, see, for example, Table 19.14. These should include ground operations and flight areas beyond the anticipated operational flight envelope. It is also normally assumed that all operations will be conducted at a dedicated airfield with perimeter fence, controlled access, and away from main roads, centers of population, and limited or controlled air movements. If it is likely that there will be large crowds, major roads, or conurbations within

Table 19.14 Typical hazard list (partial).

HZ-ID	Hazard	Relevant failure effects	Summary	Probability	Possible accidents
HZ-01	Aircraft fails to achieve flight and ditches	FE-01, FE-02, FE-03, FE-04, FE-05, FE-06, FE-10	Aircraft fails to reach a safe height during takeoff and ditches on the airfield	Infrequent	AC-01, AC-05
HZ-02	Recovery to unprepared location	FE-01, FE-02, FE-09, FE-11, FE-12.1, FE-12.2, FE-12.4, FE-12.3a, FE-12.3b	The aircraft lands at a location that is unprepared, that is, the desired landing area is obstructed	Infrequent	AC-02
HZ-03	Aircraft moving on ground	n/a	If the aircraft is not secured then it will travel if under power, potentially exposing people to risk. This hazard applies during all takeoffs and landings	Likely	AC-02

the operational area, then the severity of a crash landing might become “catastrophic” and additional mitigation will be needed before the regulatory authority is likely to approve flights. If there are likely to be other local air movements, then impact with other air vehicles is an increased risk and the pilot will need to obtain permission for flight from the local airfield control.