P A P E R III Category X : Instruments fitted on Aircraft having AUW below 5700 Kgs. ___________________________________________________________ Knowledge of the construction and functioning of all types mechanical and electrical instruments. Detailed knowledge of the methods of carrying out overhauls and repairs to mechanical and electrical instruments. Detailed knowledge of the inspections necessary to detect defects, mechanical, electrical and magnetic, as a result of wear and deterioration and the permissible allowances in each case. Knowledge of the inspection of components/ parts of mechani- cal and electrical instruments. Knowledge of the equipments/ instruments/ rigs required for testing the mechanical and electrical instruments and de- tailed knowledge of the methods/ procedures employed in carrying out the functional/ serviceability tests of the instruments after repair/ overhaul. Knowledge of the selection and inspection of materials used in the construction, repair and overhaul of mechanical and electrical instruments. Knowledge of the interpretation of circuit diagrams. Knowledge of the conventional methods of calibrating/ adjusting and testing of all types of instruments.