P A P E R - III
Category B : AIRFRAME (AIRCRAFT HAVING AUW BELOW 5700 KGS
INCLUDING ROTORCRAFT)
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1. Aircraft Materials
A general knowledge of the workshop processes , welding and
protective treatments.
A detailed knowledge of methods of assessment and removal of
corrosion including treatment and reprotection.
Knowledge of effect of various alloying elements used in
steel, properties and their use.
Detailed knowledge of Heat treatment of Steel and Aluminium.
Detailed knowledge of surface hardening processes used on
aircraft metals.
Detailed knowledge of identification and physical charac-
teristics of commonly used composite materials, plastics,
sealants, fluids and rubbers and their inspection and re-
pair.
Detailed knowledge of metallic/ fabric materials used in
aircraft structure; the types of defects associated with
them; inspection for deterioration, and methods of recti-
fication and reprotection; procedures for testing the sound-
ness of these materials.
Detailed knowledge of wooden structures and the adhesive
used in them; types of defects; inspection for deteriora-
tion; methods of rectification and reprotection, Detailed
knowledge of inspection to prove soundness in wooden struc-
tures and glued joints (applicable to only to aircraft
having wooden structures).
2. Aerodynamics
Elementary knowledge of the subsonic airflow and the various
terms used therein.
Detailed knowledge of the characteristics of the aerofoils.
Knowledge of the forces acting on the Aircraft during all
phases of flight.
Knowledge of Aircraft Stability and Control.
Elementary knowledge of the effect of altitude, weight,
changes of engine power on performance of the aircraft.
3. Aircraft Structures
Detailed knowledge of the various types of structures used
in aircraft construction, Station Nos.
Knowledge of fail-safe and safe-life concept.
Detailed knowledge of damage tolerance, SSID, major repair.
Detailed knowledge of NDT techniques and corrosion preven-
tion.
4. Aircraft Systems
General knowledge of the function and detailed knowl-
edge of inspection and overhaul 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) Flight controls; hydraulics; pneumatics; landing gear;
brakes; nose wheel steering; ice and rain protection;
fire detection and protection, warning and extinguish-
ing; oxygen; airconditioning and pressurization sys-
tems; wheels; tyres; antiskid system.
(d) Windows, doors and emergency exits.
A detailed knowledge of the procedures for the overhaul/
testing of component parts of pneumatic, hydraulic, aircon-
ditioning, oxygen, anti-icing, de-icing, fire extinguishing,
rotorcraft transmission system (if applicable).
5. Inspection Of Aircraft
Detailed knowledge of preparing the aircraft for complete
overhaul/ inspection. Procedure of removal of main compo-
nents.
A general knowledge of preparation of inspection reports
prior to repair/ overhaul.
Knowledge of defect reporting, analysis, investigation and
recording.
A detailed knowledge of the use of workshop inspection aids,
including NDT equipments, factors and limitations effecting
the choice of equipment and methods of inspection used.
A detailed knowledge of the assembly, approved repair
schemes applicable to major components including engine
mounting structures; inspection before, during and after
repair including the alignment and symmetry checks.
A detailed knowledge of the repair, inspection and testing
of water, fuel and oil tanks, heat exchanger units, fuel and
oil systems and all types of control systems.
A detailed knowledge of the weighing of Aircraft and prepa-
ration of weight schedule.Terms related to Aircraft weighing
and preparation of aircraft before weighing.
A detailed knowledge of the procedure for final inspection
of an Aircraft after overhaul and major repair.
A detailed knowledge of the care, use and checking for
accuracy of special tools.