Studi Kasus Terjadinya Interlayer Degradation Windshield No. 1 R/H pada Pesawat Boeing 737-900ER

Abstract

The Boeing 737-900ER is the latest variant of the Boeing 737 airplane equipped with a windshield that allows the pilot to observe the outside environment with some visibility. During the C-check maintenance process, a crack was detected on the No. 1 R/H windshield. The visual inspection identified this crack as interlayer degradation. The objective of this study is to determine the cause of the interlayer degradation and make appropriate repairs. The methodology used includes interviews with engineers and mechanics, and a literature review to gather relevant information and data. The results showed that the interlayer degradation was caused by overheating of the windshield, which caused the resistance to exceed the normal limit of 31.4-35.1 ohms. As a corrective measure, the damaged windshield was replaced. The resistance measurement of the windshield heater after the component replacement showed a value of 31.9 ohms, which corresponds to the normal limit of resistance for the heat sensor on the windshield.