The development history of 33.87 endurance test in aero-engine airworthiness standards CCAR-33R2 was comprehensively reviewed. Based on the interpretation of airworthiness regulation requirements

the current research of 33.87 endurance test in the world was deeply tracked. It showed the endurance test requirement remained essentially unchanged since 1 957 when the current 6 hour×25 cycles formats were implemented

but turbine engine designs had evolved significantly. The progress of engine design technology brought incompatibility with airworthiness regulations

so exploratory research and application on alternative test of 150 hour endurance test was carried out in the world. Despite of some existing issues for clarifications

the relevant research can provide reference for the accepted compliance method research and the airworthiness standard formulation and revision in China. It is of great significance for improving the compilation and revision ability about China's airworthiness technical regulations to track domestic and international airworthiness technology trends continuously and deeply

and then take positive response strategies timely and carry out targeted research on relevant provisions.