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-

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 

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.