WT Components

Annual Failure Rate

Down Time per Failure (days)

Electrical system

0.57

1.53

Electronic control

0.43

1.59

sensors

0.25

1.41

Hydraulic system

0.23

1.36

Yaw system

0.18

2.70

Rotor hub

0.17

3.71

Mechanical brakes

0.13

2.89

Rotor blades

0.11

2.60

gearbox

0.10

6.21

generator

0.11

5.39

Support & housing

0.10

4.90

Drive train

0.05

5.71