PAPER III Category A : AIRFRAME (HELICOPTERS) ___________________________________________________________ 1. The various terms used in helicopter construction and the functioning of each component part of the Helicopter. 2. Aerodynamics and theory of flight of the helicopter and theory of flight controls. 3. Preparation of a brief report, illustrated by sketches if necessary describing the replacements required in the event of damage, defect or wear. 4. The inspection and checks for alignment after assembly of the helicopter structural components. 5. The correction of faults experienced in flight with particu- lar reference to rigging and control settings and the in- spection during and after the adjustment of flying controls. 6. General maintenance (including equipment) and minor repairs. 7. The assembly of helicopter structure, with reference to the assembly and functioning of the rotors including transmis- sion. 8 A knowledge of the function, maintenance and inspection of helicopter structure and structural components, doors and windows; flying control systems and servo units; transmis- sion systems including main rotor head and balancing and tracking of main and tail rotor blades; gear boxes; free- wheel units; main rotor brakes, shafts and couplings, electric, hydraulic, pneumatic and fuel systems; landing gear (including shock struts and retracting devices), wheels, tyres, brakes, ice and rain protection systems; fire warning and extinguishing systems etc. 9. A general knowledge of the inspection and checks required after heavy landings, lightening strikes and abnormal flight loads. 10. Periodic inspections necessary to check the serviceability of life saving and safety equipment. 11. A knowledge of the principles of operation, function, test- ing and calibration to determine serviceability of pressure, gyroscopic, simple a.c. and d.c. operated instruments, Pitot systems and automatic pilots. 12. A knowledge of, and the precautions taken during airframe maintenance, jacking, towing, braking, ground de-icing, supplying ground power, refuelling and de-fuelling etc. 13. A detailed knowledge of procedure and precautions necessary to avoid deterioration of airframe and associated equipment when the helicopter is out of use for extended periods.