Rear horizontal tail overload detecting method for e.g. cargo aircraft, involves determining need for tail structural inspection by iteratively comparing current bending moment and torque values with safety envelope, during aircraft flight

摘要

The method involves determining a safety envelope from bending moment and torque values of a rear horizontal tail of an aircraft, at ground. The envelope is such that, for the values situated out of the envelope, there is a risk of permanent deformation of the tail. A need for structural inspection of the tail is found by iteratively comparing current bending moment and torque values with the envelope, during flight of the aircraft. An independent claim is also included for a device for detecting overload of a rear horizontal tail of an aircraft.