ANALISIS RISIKO KEGAGALAN PENGIRIMAN DATA RADIO LINK PADA PERALATAN VHF RECEIVER DI PERUM LPPNPI CABANG JATSC MENGGUNAKAN METODE RCA // FAILURE RISK ANALYSIS OF RADIO LINK DATA TRANSMISSION FOR VHF RECEIVER EQUIPMENT AT PERUM LPPNPI JATSC USING RCA METHOD

Sistem komunikasi penerbangan memiliki peranan penting dalam mendukung
kelancaran dan keselamatan operasional penerbangan. Pada Kantor Cabang JATSC,
Radio Link digunakan sebagai jalur cadangan (backup link) dalam sistem
komunikasi VHF Receiver. Namun, pada kondisi tertentu masih ditemukan
gangguan berupa link down yang dapat menyebabkan kegagalan pengiriman data.
Penelitian ini bertujuan untuk mengetahui kondisi jalur cadangan Radio Link,
menganalisis pengaruh obstacle pada jalur Line-of-Sight (LOS), menganalisis
pengaruh faktor cuaca terhadap kestabilan transmisi, serta mengetahui faktor
dominan penyebab gangguan pengiriman data Radio Link. Metode yang digunakan
dalam penelitian ini adalah Root Cause Analysis (RCA) dengan pendekatan
Fishbone Diagram untuk mengelompokkan kemungkinan penyebab gangguan
berdasarkan faktor Man, Machine, Method, Measurement, dan Environment. Data
penelitian diperoleh melalui observasi, wawancara, dokumentasi, dan data
gangguan pada sistem Radio Link. Hasil penelitian menunjukkan bahwa faktor
Environment merupakan faktor yang paling relevan terhadap gangguan yang
terjadi. Faktor tersebut meliputi kondisi cuaca buruk dan aktivitas petir serta adanya
obstacle berupa vegetasi pada jalur LOS. Berdasarkan hasil analisis, aktivitas petir
pada kondisi cuaca buruk menjadi faktor yang paling kuat berkaitan dengan
terjadinya gangguan link down, sedangkan obstacle vegetasi berpotensi memengaruhi kualitas dan kestabilan sinyal Radio Link. Hasil penelitian ini
diharapkan dapat menjadi bahan evaluasi bagi pihak terkait dalam melakukan
pemeliharaan dan meningkatkan keandalan jalur komunikasi Radio Link sebagai
backup link pada sistem VHF Receiver di Cabang JATSC. // Aeronautical communication systems play an important role in supporting the
safety and continuity of flight operations. At the JATSC Branch Office, Radio Link
is used as a backup link in the VHF Receiver communication system. However,
under certain conditions, disturbances such as link down events may occur and
cause failures in data transmission. This study aims to determine the condition of
the Radio Link backup link, analyze the effect of obstacles along the Line-of-Sight
(LOS) path, analyze the effect of weather conditions on transmission stability, and
identify the dominant factors causing Radio Link data transmission failures. The
method used in this study is Root Cause Analysis (RCA), supported by a Fishbone
Diagram to classify the possible causes of disturbances into the factors of Man,
Machine, Method, Measurement, and Environment. The data were collected
through observation, interviews, documentation, and Radio Link disturbance
records. The results show that the Environment factor is the most relevant factor
associated with the disturbances. This factor includes adverse weather conditions
and lightning activity, as well as vegetation obstacles along the LOS path. Based on
the analysis, lightning activity during adverse weather conditions was found to be
the factor most strongly associated with the occurrence of link down events, while
vegetation obstacles have the potential to affect the quality and stability of the Radio Link signal. The results of this study are expected to provide input for the relevant
personnel in improving maintenance activities and enhancing the reliability of the
Radio Link as a backup link for the VHF Receiver communication system at the
JATSC Branch Office.