A THERMOCOUPLE MEASURES THE TEMPERATURE AT A CERTAIN POINT IN A GAS TURBINE ENGINE. COMPOSITION AND FUNCTION OF PART: CONTAINS AN 'ELEMENT' THAT HAS TWO DIFFERENT ELECTRICAL CONDUCTORS THAT WHEN HEATED PRODUCE A VOLTAGE THAT IS PROPORTIONAL TO THE TEMPERATURE. THE TEMPERATURE IS DETERMINED BY THE CONTROL SYSTEM TO WHICH IT IS CONNECTED. THE ELEMENT IS PACKAGED WITH OTHER PARTS OF THE THERMOCOUPLE THAT ALLOW IT TO BE SAFELY MOUNTED ONTO A GAS TURBINE ENGINE. END USE OF PART: 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 THIS 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 3B HAS BEEN USED AS THE THERMOMETER IS CONSIDERED TO BE THE ESSENTIAL CHARACTER. GIR 6 HAS BEEN USED TO CLASSIFY THE GOODS TO SUBHEADING LEVEL 902519 - THERMOMETERS AND PYROMETERS, NOT COMBINED WITH OTHER INSTRUMENTS; OTHER THAN LIQUID-FILLED, FOR DIRECT READING CN CODE 90251980 - OTHER THAN ELECTRONIC TARIC CODE 9025198090 - OTHER THAN FOR USE IN CIVIL AIRCRAFT ALSO CLASSIFIED IN ACCORDANCE WITH HARMONIZED SYSTEM EXPLANATORY NOTES (HSEN) B (5) (ii) TO HEADING 9025 REFERS.