Abstract :
The fuel system is the main system that provides and supplies fuel to the engine.
One of them is the distribution fuel system which functions to supply fuel from the main
tank to the engine, to support normal distribution of fuel, the supporting components
must function normally, if one or more components do not work normally, it will affect
the fuel. pressure.
This study uses the observation method to obtain information on the failure of
fuel on low pressure conditions, and the fault tree analysis method is used to observe
and analyze the possible causes of the failure based on the troubleshooting procedure
manual TO 1T-KT-1B 22. The process of removal/installation refers to and technical
order TO1T-KT1B-2-5JG-2.
The fuel on low pressure condition is caused by the delivery jet pump component
stuck on the valve flap. After knowing the problem, the replacement process for the
delivery jet pump component was carried out based on the technical order T.O.1T KT1B-2-5JG-2. After the replacement and functional tests were carried out based on
the technical order TO1T-KT1B-2-5JG-2 page 42-1, the result was that the F PRESS
light warning on the central warning panel (CWP) did not light up, indicating that fuel
pressure had returned to normal. normal pressure. By using fault tree analysis, 19
basic events related to fuel on low pressure conditions were found, namely, (1)
insuffiency of fuel quantity, (2) fuel filter leakage, (3) dirty fuel filter, (4) broken fuel
flow indicator cable, (5) line pressure problem, (6) delivery line bending, (7) delivery
line leakage, (8) connector delivery line problem, (9) thread screw transfer jet pump
problem, (10) dirty jet pump transfer filter, (11 ) flap valve problem, (12) thread screw
delivery line problem, (13) filter delivery jet pump dirty, (14) electrical source boost
pump problem, (15) cable boost pump broken, (16) ashandle maintenance shutoff valve
broken, (17) maintenance shutoff valve stuck close, (18) flap valve stuck close, (19)
spring flap valve broken.