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Abstract
Communication equipment is the main part that supports smooth flight operations. Perum LPPNPI Palembang Branch as the provider of civil aviation navigation services in Indonesian airspace uses Very High Frequency (VHF) Extended Range (ER) receiver equipment which functions as a communication bridge between Pilots and ATC in long-range airspace. This research aims to analyze damage to the Power Supply Unit (PSU) module found in the VHF-ER Secondary receiver equipment. This module has a role as a rectifier from AC current to DC current and is very vital in keeping equipment running. This study was carried out using technical analysis methods and functional tests to identify sources of damage and evaluate the performance of the PSU module. The results of this research can be a guide for repair and maintenance of other damage.