@thesis{thesis,
		author={FAIZ MUSYADAD  HABIB},
		title ={ANALISIS PENYEBAB KEGAGALAN PADA FLIGHT CONTROL HELIKOPTER BK 117 MENGGUNAKAN METODE FAULT TREE ANALYSIS},
		year={2023},
		url={http://eprints.stta.ac.id/1252/},
		abstract={A helicopter is an airplane that is powered by two engine and its lift is 
generated by the rotation of the propellers, the thing that is very striking about 
helicopters and at the same time being a differentiator from other airplanes is that 
helicopters can fly vertically. This makes the helicopter very prone to damage, so 
to keep the helicopter safe and airworthy, routine maintenance must be carried out.
This study used the fault tree analysis method because the damage involved 
involved several crucial components on the BK 117 helicopter. Therefore, 
troubleshooting was carried out to solve the problem. This study uses a 
troubleshooting method that refers to Repair Manual 106. The troubleshooting 
process is carried out by replacing the needle bearing, shaft seal, and tension 
torsion strap parts.
The result of solving the problem is that the damage occurs to the tension 
torsion strap due to a leaky shaft seal and the impact on the lubrication of the needle 
bearing is not optimal, causing scratches and eventually causing leaks, so it must 
be replaced. After the replacement, an operational test was carried out until the 
condition of the helicopter was declared serviceable.}
		}