After studying the Aloha plane crash in 1933, our group became interested in investigating Human Performance Factors in maintenance and inspection. We divided the investigation into 5 aspects:Survey:1. The lack of inattention of mechanics in planning practical procedures and policies. Aloha Airline was operating inter-island flights in Hawaii, therefore the Aloha 243 was operating in a saltwater environment. During each flight, there was a risk that air saturated with salt and water vapor would enter the crevice when the aluminum sheets were not bonded to the fuselage by epoxy adhesive, and corrosion of the metal was also stimulated. After the accident, a full-scale investigation was launched by the United States National Transportation Safety Board (NTSB). He concluded that the accident was due to metal fatigue exacerbated by crevice corrosion, that the corrosion was exacerbated by salt water and that the age of the aircraft was already 19 years because the aircraft was operating in a salt water environment. During the pre-flight inspection, no damage or abnormal conditions were noted on the Aloha 243. Additionally, in 1988, when the Aloha 243 accident occurred, the Federal Aviation Administration did not There was no requirement for airline operators to carry out an inspection between each flight. We can say that the crevasse was exacerbated by the salty and humid air. If an inspection was carried out after each flight, this problem should be able to be aware of and avoided. As all operators and mechanics are properly trained and qualified through adequate testing and testing. examinations, they would be able to take into account the risk of corrosion being caused by salt water. Furthermore, in accordance with the authorities' regulations, they must also carry out any additional inspections specifically required depending on the condition of the aircraft (for example: age, structural and functional properties, etc.) to ensure that the aircraft aging is not in danger or that damage was caused to the aircraft during the flight. (In this case, if the inspection is carried out after each flight, accidents will be avoided.) Inspection between each flight, in addition to avoiding accidents, also helps engineers understand what problems might arise depending on the environment operating. The pre-flight inspection of the Aloha 243 was only carried out before the first flight each day, which is insufficient. In addition, all inspection records of each inspection must be maintained; it records the entire condition of parts and helps engineers understand how aircraft structures would be affected after each operation.