Abstract :
Grob G120TP-A aircraft with the Roll Royce 250-B17F engine on the oil
system uses dry-sump lubrication system, where the oil tank is located on
airframe that is placed in the mounting engine. This aircraft has a special
inverted flight oil system that is designed so that aircraft lubrication continues to
work normally when the aircraft is inverted. Between 2016 and 2019, 48 oil
failures were found.
This analysis uses the fault tree analysis method. This method is used to
identify risks that contribute to failure. This method was carried out with a top
down approach, which began with the assumption of failure or loss from a top
event, then details the causes of a top event to a root cause, then an evaluation
with a minimal cut set (MCS) was performed.
The results of the analysis using fault tree analysis method with a top event
over temperature oil system obtained 8 intermediate events, and 12 basic events,
and the component that most often resulted in an over temperature oil system was
the oil filter.