Jeppesen, a unit of Boeing Flight Services, recently released the results of a study conducted to determine the level of effectiveness of flight and duty time regulations related to crew fatigue management.  In the study, Jeppesen quantified the performance of seven flight time limitation regulatory approaches (FTLs) that were measured against 300 of the largest airline fleets worldwide.  The study highlights the inadequacy of using strict FTL rules to limit crew fatigue and instead proposes a shift in direction for the commercial aviation industry by focusing on interactive fatigue models that incorporate continuous data and feedback.

The results of the technical study can be found on the Jeppesen Fatigue Risk Management web site,  In the study, more than 2,100 optimization simulations were conducted using Jeppesen Crew Pairing optimizer functionality.  The results were analyzed in detail to calculate efficiency and safety differences between the FTLs that were studied.

“This unique study of flight and duty time regulations allows us to quantify the effectiveness of the constraints under which airlines are operating,” said Tim Huegel, director, Jeppesen Aviation Portfolio Management.  “We believe that an analytic and scientific model-based approach to the crew fatigue issue will be critical for increasing overall flight safety in the commercial aviation industry as we move forward.”  

Newly proposed Notice of Proposed Rulemaking (NPRM) flight time limitation regulatory approaches from the U.S. and Notices of Proposed Amendment (NPA) approaches from Europe were included in the study, to provide a wide range of regulatory guidelines that are used currently and will be used in the future by airlines to address crew fatigue factors.  

For more information on the industry-leading navigation, operations, training and optimization solutions provided by Jeppesen, please visit

About Jeppesen
For more than 75 years Jeppesen has made it possible for pilots and their passengers to safely and efficiently reach their destinations.  Today this pioneering spirit continues as Jeppesen delivers transformational information and optimization solutions to improve the efficiency of air, sea and rail operations around the globe.  Jeppesen is a subsidiary of The Boeing Company.  Jeppesen corporate information is available online at  

Media Contact:
Brian Rantala