Abstract :
Temperature of Interturbine is the engine temperature between
compressor turbine and power turbine. The temperature is monitored on the
aircraft instrument board. Temperature of Interturbine has increased beyond the
normal operating limits of the engine, indicates damage to the engine part.
Therefore, further analysis is needed to determine the cause of the failure or
damage to the engine components that are related. The method applied for the
analysis of the increase in Temperature of Interturbine is Fault Tree Analysis
(FTA) that is a technique for identifying risks that contribute to failure.
Generally, the steps in the analysis technique use Fault Tree Analysys
(FTA first step is data collection, second step is to define the failures that occur
then complete with a failure analysis, third step is to start a fault tree diagram,
then evaluate the minimum cut set.
Through a minimum process using a minimum cut set, is obtained the
cause of the increase in Temperature of Interturbine that occurs by the
compressor parts, heat engine parts and FCU problems. The problem in the
compressor part is the retraction of air intake, compressor (dirty, erosion and
FOD), leakage in the compressor valve, and air leakage in the case of a gas
generator, fuel nozzle and drain valve, on the other side of the engine's heat which
is damage to the turbine compressor propeller ring, blade compressor turbine and
leakage on the interstage sealing ring. The problem with FCU is the damage to
fuel injection, igniton, fluctuation and fuel valve.