The AME B1.3 stream is specifically meant for helicopters powered by turbine (gas turbine / turboshaft) engines these are not small piston engine choppers but medium to heavy rotor craft used in civil corporate and defense aviation.
As a B1.3 student, you will study the full mechanical and powerplant systems of such helicopters. That includes: engines, rotor and transmission systems flight controls hydraulic/pneumatic/fuel systems and the structural components specific to rotor wing aircraft.
Although the official course does not always list specific models, typical turbine-engine helicopters like those from manufacturers such as Airbus Helicopters Bell Helicopter Sikorsky Leonardo Helicopters etc. would fall under the B1.3 domain when powered by turboshaft engines.
In an Indian context rotorcraft like HAL Dhruv (turbine engine helicopter) are good real life examples of what a B1.3 AME might eventually maintain.
In depth study of turbine helicopter engines their construction operation maintenance and overhaul.
Maintenance and servicing of rotor mechanics transmissions flight control systems hydraulic pneumatic and fuel systems unique to helicopters.
Structural and mechanical aspects specific to rotary wing (helicopter) aerodynamics systems and bodies, rather than fixed wing aircraft aerodynamics
Practical training on real turbine engine helicopters combined with theoretical knowledge from engines and controls to safety regulation compliance and certification procedures.
Helicopters with turbine engines are among the most technically complex flying machines. Their maintenance demands high precision deep mechanical understanding, and strong problem solving skills because rotorcraft dynamics vibration and mechanical stress are quite different from fixed wing airplanes.
Completing AME B1.3 prepares you for a career as a licensed maintenance engineer (under Directorate General of Civil Aviation DGCA) capable of inspecting repairing and certifying turbine helicopters for safety and airworthiness a role that's critical for civil corporate or defense aviation operations.