ANALISIS KEGAGALAN SISTEM LANDING GEAR ATR 72-600 DALAM PROSES C-CHECK DI HANGGAR PT. MERPATI MAINTENANCE FACILITY DENGAN MENGGUNAKAN METODE FAULT TREE ANALYSIS

PALMERIUS WIRYANTO, BENITIUS (2021) ANALISIS KEGAGALAN SISTEM LANDING GEAR ATR 72-600 DALAM PROSES C-CHECK DI HANGGAR PT. MERPATI MAINTENANCE FACILITY DENGAN MENGGUNAKAN METODE FAULT TREE ANALYSIS. Tugas Akhir thesis, Institut Teknologi Dirgantara Adisutjipto.

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Abstract

Landing gear is a component that functions to support the aircraft when the aircraft is on the ground and assists the aircraft when taxing, landing gear also has a transition function (retract and extension). The transition function (retract and extension) on this landing gear cannot be separated from the hydraulic system components. Hydraulic system is a system that works hydraulically to help move the various components contained in the aircraft. The hydraulic system is divided into two parts, namely the blue hydraulic system and the green hydraulic system. The green hydraulic system is a hydraulic system that functions to perform the transition (retract and extension) as well as normal braking on the landing gear. This system certainly has an important role because if there is damage or failure of this system, it can certainly cause the transition function (retract and extension) on the landing gear to not work. The failure of the landing gear unproper fit position is indicated by the position of the landing gear when the retract transition is not in place and the landing gear is not locked. This condition can certainly endanger flying activities and can cause the aircraft to abort. Following up on failures found when the engineers carried out functional tests, an inspection was carried out according to the ATR 72-600 troubleshooting manual (TSM) reference in task 32-31-00. After the initial inspection was carried out according to the troubleshooting manual reference (TSM) ATR 72-600 on task 32-31-00, the failure came from the electric pump which was no longer operating optimally. The electric pump is no longer operating optimally because the electric pump has entered its lifetime. To restore the normal performance of the electric pump, it is considered necessary to replace the electric pump. Replacement of electric pump components is carried out in accordance with the reference JIC 29-10-00 RAI 10010-002 ATR 72-600. Analysis of the causes related to the problem of unproper fit position landing gear using the fault tree analysis method, obtained 11 basic events, namely, (1) electric pump trouble, (2) weak battery, (3) connector trouble, (4) pressure transmitter trouble, (5) piston trouble, (6) roller pin fail, (7) hook crack, (8) tank leakage, (9) below minimum quantity, (10) contamination, (11) low viscosity.

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