GM1 CS FTL.1.205(a)(2) Flight duty period (FDP)

APPROPRIATE FATIGUE RISK MANAGEMENT (APPROPRIATE FRM) The term ‘appropriate FRM’ is a term chosen to refer to a set of principles and tools that support the operator and their operational personnel in managing particular fatigue hazards and associated risks through the safety risk management (SRM) process within the operator’s management system, in full compliance with the duty time, flight time limits and rest requirements defined by Subpart ORO.FTL. It should be distinguished from the fully-fledged fatigue risk management (FRM) system described under ORO.FTL.120. An FRM system under ORO.FTL.120 is a scientifically based, data-driven complement or alternative to the prescriptive regulation of flight and duty time and rest requirements, which manages crew fatigue in a flexible manner with due consideration to the risk exposure and the nature of operations. Operators need such FRM system when deviating from the certification specifications or when applying a mix of prescriptive rules and flexible arrangements. Conversely, an ‘appropriate FRM’ concept supports implementation of the rules and is applied without deviating from them. These two distinct methods are also supported by ICAO (ref.: ICAO Doc 9966).