FTA AND FMECA ANALYSIS FOR DETERMINE CRITICAL COMPONENTS OF DIESEL GENERATOR CUMMINS KTA 38D

Abstract

A diesel Generator is equipment has functions as a power generator and electricity supply. Tanker warship is one
of the navy warships applying diesel generator Cummins KTA 38D for electricity supply when going on mission
area or at basecamp. On diesel generator system consists of 7 (seven) sub-system are coolant sub-system,
seawater cooling sub-system, fuel oil sub-system, air intake and exhaust sub-system, Lub oil sub-system, Electric
starter sub-system and controlling sub-system. Due high operating hours, the potential for damage is increasing,
because damage a component diesel generator. According ship damage report data, the percentage damage of
diesel generator reach until 38.5% from total equipment damage that occurred during 2016-2022 year. Based on
that phenomena, this research will identifcation factors that cause damage and determine the components have
high criticality in the diesel generator using the FTA (Fault Tree Analysis) to systematically explain unexpected
causal factors that lead to failure, and the FMECA (Failure Mode Effect And Criticality Analysis) method to identify
critical components according factors have the highest critical point with calculation of the Risk Priority Number
(RPN). The results of calculations and analysis using the FTA and FMECA methods, there are 6 (six) critical
components with the highest RPN value in the diesel generator system, that Tube sea water component (375,4)
with the risk of leaking, Impeller components (377,1) with a risk of corrosion/crack, Body Cover SW (372,0) with
a risk of corrosion, Mechanical Seals (369,8) with a risk of leaking/damage, strainer (369,1) component with a risk
of corrosion, Rectangular seal HE (367,9) a risk leakage and Battery (371,0) with a risk no power electric for start
engine.
Keywords: Diesel generator, FTA, FMECA, Critical components