Published date: 27 October 2006


This Advisory Circular (AC) describes acceptable means of compliance with requirements relating to the development of a flight crew fatigue management system in accordance with Parts 121, 125, and 135.

Related rules

This AC relates specifically to Subpart K of Parts 121, 125, and 135.

Change notice

Revision 2 removed the exception in the last paragraph of the General Restrictions section on Page 4 as the references to flights made “in the interests of safety or health of any person” is a different (and lower) test than that required by S13A of the Act for breaching the provisions of the Act or Rules made under the Act.

Note: In accordance with the Health and Safety at Work Act 2015(external link) , organisations are required to make sure their operation is safe (so far as is reasonably practicable), which includes minimising the risk of fatigue for all workers performing safety-related duties. CAA Advisory Circular AC119-2 Air Operations – Fatigue of Flight Crew provides an example for various types of air operations. Further information and guidance can be found on the CAA Fatigue Risk Management webpage.