P A P E R - III
Category A : AIRFRAME (AIRCRAFT HAVING AUW 5700 KG. AND
ABOVE)
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1. Aircraft Materials
Knowledge of effect of various alloying elements in the
structure of steel/ Aluminium, their properties and use.
Knowledge of Heat treatment of Steel and Aluminium.
Knowledge of surface hardening processes used on aircraft
metals.
Knowledge of identification and physical characteristics of
commonly used composite materials, plastics, sealants and
rubbers and their inspection and repair.
Detailed knowledge of metallic materials used in aircraft
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.
Detailed knowledge of the various types of corrosion com-
monly encountered on aircraft metals, their removal and
methods employed to prevent corrosion.
Knowledge of use of hardness testing machines, various types
of hardness no. and surfaces finishes.
2. Aerodynamics
Knowledge of the characteristics of the subsonic, transonic
and supersonic airflow and the various terms used therein.
Knowledge of the characteristics of the aerofoils used for
subsonic and transonic flights.
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.
Knowledge of various types of high lift and drag devices,
their operation, vortex generators, boundary layer fences
etc.
Knowledge of the following :
Sweepback wing; High incidence tailplane; aerodynamic
loading; superstall; load factors; aquaplaning; fly by
wire concept.
3. Aircraft Structures
General understanding of the various types of structures
used in Aircraft construction, Station Nos.
Knowledge of fail-safe and safe-life concept.
Knowledge of such terms as damage tolerance, ageing
aircraft, SSID.
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 flight controls including power operated/
assisted flight controls; hydraulics; pneumatics;
landing gear; brakes; nose wheel steering; wheels;
tyres; antiskid; ice and rain protection; fire detec-
tion and protection, warning and extinguishing; oxygen;
airconditioning and pressurization systems; life saving
equipment including inflatable slides, dinghies and
rafts.
(d) Windows, doors and emergency exits.
5. Aircraft Instruments and Equipments
Elementary knowledge of the operational principles of all
instruments (except the engine related instruments).
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 and various methods of rectifica-
tion and repair of minor defects, rigging of aircraft,
periodical inspection necessary to check the serviceability
of the Aircraft, inspection of the Aircraft after heavy
landing, lightening strike and abnormal flight loads, prepa-
ration of a brief report with the help of sketches if neces-
sary in case of damage to the Aircraft.
Knowledge of terms related to aircraft weighing, prepara-
tion/ precaution and method of weighing the aircraft.
Knowledge of duplicate inspection of control systems.