STUDI KASUS NITROGEN GENERATION SYSTEM INDICATOR BLUE LIGHT MENYALA (DEGARADED) KETIKA DI GROUND PADA PESAWAT BOEING 737-900ER

Abstract

Reflecting on several aircraft accidents which experienced explosions in the fuel tank, a system was installed, namely the Nitrogen Generation System (NGS), which relies on nitrogen gas (N2) to neutralize oxygen gas (02) in the fuel tank. The Nitrogen Generation System (NGS) has several components installed in the left air conditioning compartment bay on Boeing 737-800/900ER aircraft. In this writing, we use observation methods, analysis methods, and literature methods. Regarding the problem of the Nitrogen Generation System Indicator Light Turning Blue (Degraded) When on Ground, it is necessary to identify the system and carry out a repair or troubleshooting process. What most often occurs is due to damage to the Air Separation Module (ASM), but it does not rule out the possibility of other components having problems. For example, in the case that I analyzed, it was caused by a system failure in the over-temperature shutoff valve (OTSOV) component which ultimately resulted in a part being replaced, so appropriate handling of this problem is needed which aims to prevent the occurrence of several conditions that could endanger passengers and the aircraft.