Abstract :
Boeing 737-800 NG is an aircraft using three types of braking, namely
wheel brakes, thrust reversers and ground spoiler. The wheel brake consists of
several layers of carbon or steel discs called a stack. The basic principle behind
every brake operation is to create a controlled frictional process that increases the
deceleration rate.
The failure analysis that occurs in the brake system is based on
observations and information obtained from field instructors and mechanics. In
addition to using the observation method, this research also uses analytical
methods to find the causes of problems with loss of braking ability on Boeing 737-
800 NG aircraft. The method used is the fault tree analysis method to identify
failures where the aircraft experiences a loss of braking ability caused by the
brake shuttle valve and brake matering valve.
analysis using the FTA method to find out the causes of failure in the brake
system, after analysis, two failure conditions were found, namely failure of the
brake matering valve and brake shuttle valve after making the FTA and found 11
basic events that could trigger the top event: Damaged valve, Failed Engine
Driven Pump, Failed Electrically Driven Pump, insufficient hydraulics, broken
seal, incorrect torque, insufficient hydraulics, leaking valve, corrosion, Damage,
corrosion.