An engine cooling system of a bus vehicle consists of the following components with the ARINC weightings, MTBF, and MTTR

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An Engine Cooling System Of A Bus Vehicle Consists Of The Following Components With The Arinc Weightings Mtbf And Mttr 1 (58.53 KiB) Viewed 56 times

An engine cooling system of a bus vehicle consists of the following components with the ARINC weightings, MTBF, and MTTR given below: No. ARINC Weighting MITR (hours) Components Water Pump MTBF (hours) 50,000 1 0.20 12 2 Thermostat 0.06 100,000 2 3 Pipe 0.40 15,000 20 4 Radiator 0.08 120,000 10 5 Cooling Fan 0.10 100,000 8 6 Coolant Tank 0.12 5 80,000 200,000 7 Engine Control Unit 0.04 4 If the MTBF target of the engine cooling system is 8,000 hours, a) Calculate the target failure rate of the engine cooling system. b) Calculate the target failure rates of each component using ARINC method of reliability target apportionment. c) Calculate the target MTBF of each component. d) Determine which component(s) fails to meet the reliability targets by ARINC method. e) Explain how the availability of the engine cooling system can most effectively be improved.