ANALISIS UNSTABLE ENGINE POWERPADA ENGINE PT6T HELIKOPTER BELL 412 EP DENGAN METODE FAULT TREE ANALYSIS

Fauzi, Safiq (2022) ANALISIS UNSTABLE ENGINE POWERPADA ENGINE PT6T HELIKOPTER BELL 412 EP DENGAN METODE FAULT TREE ANALYSIS. Thesis thesis, Institut Teknologi Dirgantara Adisutjipto.

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Abstract

The fuel system is an important system found in airplanes that functions as the main system in distributing fuel to the engine. So if a fuel system component fails it will have a negative impact on engine performance, which allows the aircraft to experience an accident and can claim lives. One of the parameters that affect the performance of the engine on the helicopter is the fuel system. The importance of the role of the fuel system in the engine so that the engine is able to work optimally. If it fails, the supply will decrease and the fuel flow will not run smoothly, this can result in an unstable fuel supply that goes into the combustion chamber, if the fuel supply that goes into the combustion chamber is not fulfilled, the engine performance will not be optimal and has the potential to endanger flight safety. Failure analysis that appears on unstable engine power is based on observation and troubleshooting based on manual references, besides using the observation method, this study also uses the fault tree analysis method to find other causes of unstable engine power problems. The cause of unstable engine power is the reduced amount of pressurized fuel supply caused by a clogged fuel filter component and two clogged fuel nozzle sprayers. So that the fuel filter component needs to be replaced and the fuel nozzle sprayer needs to be cleaned in the clogged area. The cause of unstable engine power based on the results of the fault tree analysis found 12 basic events, namely fuel low quantity, fuel contaminated, switch problem, shutoff valve not working, check valve leakage, fuel filter problem, clogged fuel nozzle sprayyer, clogged transfer tubes, broken strainer , FCU problem, boost pump problem, EDP problem.

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