ANALISIS RELIABILITY AIR CYCLE MACHINE (ACM) BOEING 737-900ER MENGGUNAKAN METODE FAILURE MODE AND EFFECT ANALYSIS (FMEA) DAN METODE WEIBULL

Dirga Yurdana, Muhammad (2023) ANALISIS RELIABILITY AIR CYCLE MACHINE (ACM) BOEING 737-900ER MENGGUNAKAN METODE FAILURE MODE AND EFFECT ANALYSIS (FMEA) DAN METODE WEIBULL. Thesis thesis, Institut Teknologi Dirgantara Adisutjipto.

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Abstract

This study aims to determine the most common cause of damage to the Air Cycle Machine (ACM), identify failure modes using the Failure Mode and Effect Analysis (FMEA) method, and analyze the reliability and failure rate using the Weibull method. Analysis. This research was conducted based on data on failure and damage to the air cycle machine (ACM) for the period January 2020 to September 2022 of Boeing 737-900ER aircraft and there were 22 cases. Based on the results of the quantitative analysis, it was found that the most common Air Cycle Machine Stuck Can not Rotate occurred. being the owner of the highest RPN value of 200 and this case has a frequency of up to 10 times in the time period studied. Based on the rank of the RPN value, this case is in the medium category. Based on the analysis of the reliability level and failure rate using the Weibull Analysis method contained in the Minitab 19 Software, the beta value (B) is 3.18458 (Flight Hours) which indicates wear out failure occurs. Then also obtained the Mean Time To Failure (MTTF) value of 23436.1 Flight Hours for the Air Cycle Machine case. The reliability value of the Air Cycle Machine at MTTF (Mean Time To Failure) is 49.48% (for analysis on Flight Hours). The recommended type of treatment for this type of damage is the Time Directed (TD) category of preventive maintenance.

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