A method of providing maintenance to an aircraft having multiple aircraft systems and a method of operating an aircraft having multiple aircraft systems, with at least some of the aircraft systems outputting one or more visual indicia indicative of a statu...

The method involves increasing speed of rotation of a gas generator until a turbine engine develops a maximum power. The speed of rotation of the gas generator is reduced until the reduced speed of rotation reaches a test value. An aircraft is stabilized b...

The method involves acquiring a monitoring parameter of a turbine engine of an aircraft i.e. rotary wing aircraft, and determining whether the aircraft is flying in level with forward flight. A stability of the monitoring parameter is verified. A measureme...