Line maintenance is constituted of an entire care process transits , preset processes and approved by the Civil Aviation Act , which allow us to ensure that the next flight will take place smoothly, which include operational tests , functional tests , review systems and computers vulnerable to constant failures , revision indoor equipment , emergency equipment , attention to reports of crew, full external review of all aircraft tire pressure , oxygen levels amount of oil and hydraulic fluid , overhaul fuselage , visual inspection usually by lightning strikes , obvious hits, loose parts , all within the standard transit time on the platform, with this operation remains in good condition