THIS 'ELEMENT' IS PART OF A THERMOCOUPLE THAT MEASURES THE TEMPERATURE AT A CERTAIN POINT IN A GAS TURBINE ENGINE. COMPOSITION OF PART: MADE FROM MI CABLE: MINERAL INSULATED CABLE CONSISTS OF TWO CONDUCTOR WIRES (NICKEL-CHROMIUM AND NICKEL-ALUMINIUM) HELD IN PLACE WITHIN A METAL SHEATH AND ISOLATED FROM EACH OTHER BY MAGNESIUM OXIDE (MGO). THE THERMOCOUPLE ELEMENT IS ASSEMBLED TO OTHER COMPONENTS TO TURN IT INTO A THERMOCOUPLE THAT CAN BE SAFELY MOUNTED ONTO A GAS TURBINE ENGINE. FUNCTION OF PART: HEATING OF THE TWO DIFFERENT ELECTRICAL CONDUCTORS IN THE ELEMENT OF THE THERMOCOUPLE PRODUCES A VOLTAGE THAT IS PROPORTIONAL TO THE TEMPERATURE. THE TEMPERATURE IS DETERMINED BY THE CONTROL SYSTEM TO WHICH IT IS CONNECTED. END USE OF PART: THIS PARTICULAR ELEMENT IS INCORPORATED INTO IS A T25 THERMOCOUPLE FOR THE ROLLS-ROYCE XWB CIVIL GAS TURBINE AERO ENGINE.

CLASSIFICATION HAS BEEN DETERMINED IN ACCORDANCE WITH THE FOLLOWING: GENERAL INTERPRETATIVE RULES (GIR)S GIR 1 HAS BEEN USED TO CLASSIFY THE PRODUCT BY THE TERMS OF HEADING 9025 HYDROMETERS AND SIMILAR FLOATING INSTRUMENTS, THERMOMETERS, PYROMETERS, BAROMETERS, HYGROMETERS AND PSYCHROMETERS, RECORDING OR NOT, AND ANY COMBINATION OF THESE INSTRUMENTS GIR 6 HAS BEEN USED TO CLASSIFY THE GOODS TO SUBHEADING LEVEL 902590 PARTS AND ACCESSORIES TARIC CODE 9025900090 OTHER THAN FOR USE IN CIVIL AIRCRAFT ALSO CLASSIFIED IN ACCORDANCE WITH NOTE (B) (ii) TO THE HSENS OF HEADING 9025.