ANALISIS KEANDALAN KOMPONEN PNEUMATIC SYSTEM PADA PESAWAT BOEING 737-800 NG MENGGUNAKAN METODE RELIABILITY BLOCK DIAGRAM

Ramadhani, Aditya (2023) ANALISIS KEANDALAN KOMPONEN PNEUMATIC SYSTEM PADA PESAWAT BOEING 737-800 NG MENGGUNAKAN METODE RELIABILITY BLOCK DIAGRAM. Thesis thesis, Institut Teknologi Dirgantara Adisutjipto.

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Abstract

Aircraft must pay attention to all aspects of maintenance and maintenance for safety and comfort when the aircraft is operating. The slightest damage to an aircraft can jeopardize the safety of passengers during flight. The pneumatic system works by supplying compressed air to the aircraft, where the pneumatic system has a power source that comes from APU (Auxiliary power unit)¸ Engine Bleed air, Pneumatic Ground air connection. One aspect of aircraft safety that needs to be considered is the supply of air into the cabin so that there is no low duct pressure. There are 3 distribution approach methods, namely using the exponential distribution method, Weibull distribution, and Lognormal Distribution. In performing the calculation the author uses a distribution with an Index Of Fit value close to 1 and is used to calculate the reliability value. A reliability Block Diagram (RBD) is a method to perform system reliability and availability on large and complex systems using system block diagrams (Ebeling, 1997). RBD is also known as a dependency diagram An RBD is taken as a series of connected blocks in parallel or series configuration. Based on the results of data processing that has been done, 7 components are obtained that cause low duct pressure, namely High Stage Valve, Precooler Control Sensor (390f), Prsov, Bleed Air Regulator, 450 F Thermostat, High Stage Regulator, Precooler Control Valve. Then calculate the component reliability value and obtain the reliability value of the BAR component (0.3464%), HSR (0.3707%), HSV (0.8212%), 450 F Thrmst (0.6421%), PRSOV (0.7255%), PCV 390F (0.6380%), PCV (0, 5644%) combined reliability value with RBD series series results obtained Rseri Based on the calculation results, it can be known under the reliability value for the pneumatic system that causes low duct pressure which without involving APU is 0.177%.

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