P A P E R - III

   Category A : AIRFRAME (AIRCRAFT HAVING AUW BELOW 5700 KG.)
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                        1.  Aircraft Materials

     Knowledge  of  effect of various alloying elements  used  in 
     steel,  properties and their use.

     Knowledge of Heat treatment of Steel and Aluminium.

     Knowledge  of surface hardening processes used  on  aircraft 
     metals.

     Knowledge  of  welding techniques such as gas  welding,  arc 
     welding, electric welding etc.

     Knowledge of identification and physical characteristics  of 
     commonly  used composite materials, plastics,  sealants  and 
     rubbers and their inspection and repair.

     Detailed  knowledge of metal/ fabric materials used in  air-
     craft structure; the types of defects associated with  them;    
     inspection  for deterioration, and methods of  rectification 
     and  reprotection; procedures for testing the  soundness  of 
     these materials. Doping process.
                    
     Knowledge  of  the  various  methods  used  for  removal  of 

     corrosion  from common aircraft metals and methods  employed 
     to prevent corrosion.

     Knowledge  of types of wood and glue and their  characteris-
     tics, general defects, tests, inspection and repair.

     Knowledge of cables, chains and sprockets.

                           2.  Aerodynamics

     Knowledge of the characteristics of the subsonic airflow and 
     the various terms used therein.

     Knowledge of the characteristics of the aerofoils.

     Knowledge  of the forces acting on the Aircraft  during  all 
     phases of flight.

     Detailed knowledge of Aircraft Stability and Control.

     Knowledge of the effect of altitude,weight,changes of engine 
     power on performance of the aircraft. 




                       3.  Aircraft Structures

     General  understanding  of the various types  of  structures 
     used in Aircraft construction, Station Nos.

     Knowledge of such terms as damage tolerance, aging Aircraft, 
     SSID.

     Knowledge of fail-safe and safe-life concept.

     Knowledge of various types of methods used on tubular struc-
     ture, semi-monocoque fuselage, method of attachment of  wing 
     to the fuselage; permanent and semi-permanent joints,  their 
     inspection and repair.

                         4. Aircraft Systems

     General   knowledge    of  the   function,  maintenance  and 
     inspection of the following :

     (a)  Structure  and structural components  constructed  from 
          metal,  glass fibre, glass reinforced  plastic,  vinyl, 
          perspex.

     (b)  Furnishing  materials,  paints,  surface  finishes  and 
          associated materials.

     (c)  Elementary  flying  controls;  hydraulics;  pneumatics; 
          landing gear; brakes; nose wheel steering; ice and rain 
          protection; fire detection and protection, warning  and 
          extinguishing; oxygen; airconditioning and  pressuriza-
          tion systems; wheels; tyres; brakes; antiskid.

     (d)  Windows, doors and emergency exits.


                5. Aircraft Instruments and Equipments

     Detailed knowledge of the procedures of replacement and  in-
     situ operational tests of all instruments (except the engine 

     related instruments) and equipment  (except where the use of 
     special test instrument/ equipment is required.)

     Knowledge of construction of various types of Direct Reading 
     Compass, various related terms used in electricity/  magnet-
     ism, and compass swing precautions and procedures.

                      6. Inspection Of Aircraft

     Knowledge  of minor defects, their reporting,  investigation 
     and  methods of rectification and repair of  minor  defects, 
     rigging  of  aircraft, periodical  inspection  necessary  to 




     check  the serviceability of the Aircraft, preparation of  a 
     brief report with the help of sketches if necessary in  case 
     of  damage  to the Aircraft. Symmetry  check,  Balancing  of 
     control surfaces; duplicate inspection.

     Detailed knowledge of the various inspections such as  heavy 
     landing,  lightening strike , overweight  landing,  abnormal 
     flight  loads etc.; Familiarity of the  structural  manuals, 
     various types of repairs given by the manufacturer  therein; 
     incorporation of alternate/ equivalent materials; raising up 
     of  modifications,  repair schemes to  the  aircraft  during 
     overhaul.

     Knowledge  of terms related to aircraft  weighing,  prepara-
     tion/ precautions for weighing, preparation of weight sched-
     ule, calculation of centre of gravity.